Well, grass is his best surface, and there's still a good number in the top 100 in the "grass is for cows" camp. He is quite clearly much higher in the world on that surface than on clay for example, where he'd be lucky to be top 200.
He's a former Queens semi finalist - I noted you missed that out. Also, he's improved immeasurably in the last few years.
Interesting that the world number 89 is "nowhere near" top 40 on his best surface.