Allen turned in a man-of-the-match performance during Saturday's 1-1 draw at Leicester City.
“He's different class, Joe Allen," Lambert exclaimed. “I think he's one of these kids that goes about his business like a passing ship.
“You don't really notice him, but you take him out of the side and you go: `woh, where is he?'
“He probably doesn't get the credit he actually deserves for a lot of the things he does.
“But when it comes to his level of performance, his enthusiasm for the game is infectious and I think he's another one enjoying his football at the minute and he looks great."