I disagree with all portion sizes being generous.
Yes most of them are, but we have run on some that were not.
My husband is a very big eater, at 6'3 240 he isn't huge, but certainly a force to be reckoned with.

Most meals are good for him, but after LeCellier and San Angel Inn he wasn't totally satisfied "full" wise. So he snacked quickly after those meals.
So I would answer your question as most meals are enough for men, but you may run upon an exception.
If you are thinking of doing your TS for lunch, I would not, go for dinner because if he is still hungry what $$ are you saving if he needs something else.
Oh and one other thing, both of us have noticed that at WDW we eat more, not because we are so close to all the wonderful food but because we burn 3 times the calories that we do at home. Something to keep in mind.
Enjoy your trip!
