Size?

Question
I am a pitcher and most people think that in baseball size matters.  I clearly break that assumption being 5'9" and 160 pounds who can throw 90-91 mph (I model my mechanics after Tim Lincecum) where other guys on my varsity team are huge 6'3" 220 pound guys but I can still throw harder and I have better success than the others.  Hitting I'm also about equal to them.  Why is  it that scouts go after the big guys first?  My coach knows my skills but I still get nothing out of college scouts.  Do you think that somehow the scouts could have gotten into the mind set of size mattering? (Yes I know this sounds kind of like I'm complaining and that it's nothing I have control over but... What do you think?)

Answer
I think size matters to Major league scouts I'm not so sure about college scouts.I think in college they want you to be able to get guys out.You mentioned college.What grade are you in?Let me ask this question,are you going to the showcase tournaments where the college scouts are?