Can the iPhone detect the size of a touch?

Question

As far as I can tell the iPhone multitouch framework sends the location of each touch but not the size.

I want to allow the user to tap a button with the tip of their th

Answer 1

All these answers are wrong. The fact that Apple doesn't appear to sanction this in apps on the store is a different matter.

 float vf = 10.0; 
 id valFloat = [thisTouch valueForKey:"pathMajorRadius"]; 
 if(valFloat != nil) {
   vf = [valFloat floatValue]; 
 }

I really wish that this issue would get pushed harder by users and developers.