It is to a degree, yeah. But I think psychologically that fight messed with DC's head an absolute ton. A lot of what I'm about to say is 100% pure conjecture on my part, so keep that in mind as you read it.
Jones vs OSP was probably a SLIGHT letdown for Jones in terms of who his oppnent was. I'd imagine he was more "up" for DC given their history, etc. But he'd already beaten DC, didn't have to prove he could. I think you're right in that to a degree, Jones played it sort of safe vs OSP. But he also looked to tire in that fight like I hadn't seen before. Not horribly, but more that what we'd seen in his previous 5 round fights.
DC vs Silva wasn't a slight letdown for DC. It was ARMAGEDDON. DC is OBSESSED with beating Jones to cement his legacy. Jones finally clears his legal hurdles, the fight is on, DC gets his chance at redemption. Then just DAYS before the fight Jones is out and DC gets an aging MW legend who's well past his prime. DC isn't ultra wealthy so no way he turns down the fight and the payday of being on the UFC 200 card, that wasn't going to happen. But I have to believe that in his mind he went in thinking "I'm gonna go lay on this guy for 15 minutes and collect my $ and move on to real fights." Then the crowd starts booing (a huge crowd of course) and he gets caught up in the moment and stands in front of Silva and gets tagged a couple times while being lazy in rd 3. The long and short of it is I don't think that's the performance we'd have seen vs Jones (or even close to it).
I put more stock in how he looked vs Rumble, who's been flatlining everyone. Granted, Rumble fought a bizarre fight and helped DC look dominant by playing into DC's strengths. That can't be ignored. But DC still dismantled Rumble (again) and I can't discount that, even if Rumble fought a very foolish fight from a strategic standpoint.
Yeah it's definitely conjecture, but when you literally have money on it, speculation is completely warranted. You should evaluate every nook and cranny when putting your own money on the line.
Furthermore, I believe that your "head shrinking" of DC is probably on point. He had virtually nothing to gain in the Anderson Silva fight and everything to lose. He fought safe. Even talking with Ariel he said that he basically was barely training against Ryan Bader and that the other top guys in the division don't do anything for him. So yeah, he is terribly obsessed with Jon.
After I watch the OSP fight I thought to myself, JBJ better be glad that that was OSP in there and not DC because he just dodged the biggest bullet. That said, I also thought about him facing OSP like you did with DC facing Anderson. That is to say that Jones recognized that OSP was absolutely no threat and completely out of his league. Therefore he just went in there and did enough to get the win, However, hadhe been facing DC, I believe we see a vastly different Jones at that time.
Let me indulge you in some conjecture of my own. I believe that Jones is basically DC's kryptonite. That one hurdle that he will never get over. Jones is to DC as Chuck was to Tito and Frankie was to BJ, just stylistically bad matchup's and that one guy always has your number.
I will leave we're going to see Jones at his peak. The best we've ever seen. He's only 30 years old and is it coming off an injury. He seems to have his shit together for now at least. The greats are able to take I was out of time off and still come back as great or exceed expectations. Dominic Cruz did it in his first fight back with Miz The first time and TJ Dillashaw the second. Conor came back after shredding his ACL and did it against Chad Mendes and Jose Aldo respectively. JBJ is in that caliber. No he is better than that caliber.
JBJ has a quiet calm about him going into his fight, like 2010 Kobe Bryant. Calm, collected and on a mission. You could be right, but there's no way I'm betting against JBJ until I see a reason to do otherwise. I think that the OSP fight is an outlier and not something that we should get accustom to.
But we will definitely see if he shows up this time LOL