I think everyone forgot how good a player Hernandez actually is over the last year. Should be coming into his peak now too.
I wish this whole "peak" generalisation business would stop. There is a very, very broad trend in certain positions but as far as individual players go they all peak at certain times. Look at Jonny Evans, at centre back who played his best football in his early 20's. Fabregas was arguably better in his late teens/early 20's than in his mid 20's while Pirlo you could argue was better at 34 than he was at 28.
It's such a daft thing to assume any player should be playing their best football during certain years. They play their best football when conditions are at best for them, be it youthful confidence and fitness or by using their experience. It could be due to a particular set up they play in, with particular players, under a particular manager or it could just be that they hit a point in their life where the external trappings of being a footballer no longer appeal to them and they are able to focus on improving themselves as a player instead. The whole idea that there is a particular age that a player or type of player in particular positions come into their peak is just stupid.