Age wise yes, but all players are different. The Ramsey of 3/4 years ago was arguably world class. He hasn't hit those heights since and maybe that's down to a series of injuries. Or maybe he just peaked early.
Let's put it this way, the Ramsey of 3 years ago wouldn't be sitting here with 6 months left on his contract. No way.
Why not? Sanchez and Ozil got to this stage.