GSP would have dominated Silva, that's why Silva didn't move down to 170 when he had the opportunity. The same people that are saying Georges ducked Anderson for not moving up are probably some of the same people that gave Cyborg shit for not making 135. Anderson nuthuggers are also the same people that when talking about fighting George at 170 say "he's too big to make the cut", then when it comes to fighting Jones they would say "he's too small, he's fat at 200". You can't really listen to some of these people.
Do I think Georges totally wanted that fight? No, he could have gone up to 185. However, why would you give the bigger guy all the advantages? GSP is more heavily muscled, but Silva is naturally a much bigger guy. The least you could ask for is that the weight differential be negligible. If Silva said "I will go to 170 to fight GSP" and then Georges said no, then you could call it ducking. In the same way Silva didn't duck Jones. In fact, the Silva/Jones case is stronger, thanks to Anderson fans.
Anderson Silva fought 205 multiple times, but when people try to discredit those wins at 205, Silva fans would jump in and talk about how great they were. So if Anderson is a force at 205 and racked up serious wins, why couldn't he fight Jones at 205? I don't think he should have, I don't think Bonnar, Irvin and even Griffin are great wins. I mean yeah, Griffin was a former champion, but he's literally the Meisha Tata/Michael Bisping of LHW in terms of champions.