^ That's quite possibly true, I know that when I train on week ends at 4-5PM after I had something for lunch, I have more energy for my session. However in terms of duration, I still feel tired around the 45min mark. The tonage or number of sets might have been higher, I would have to check.
But sure, in terms of feeling good and all, it's way easier later in the day than at 7AM when I sometimes have to drag my ass to the gym because I barely slept 6 hours. It's just that it's convenient for me, and works with my goals (so far).