Was at the lbs today and was measuring a Trance4 size large and the top tube isnt even close to what the website has listed (24.1) I was getting only 23.6 from center of top of head tube level to center of seatpost. The bike mechanic came up with the same thing. So whats the actual top tube on the XL? Does Giant have a rep that answers questions on this board? Any one ever try to find out why these numbers are wrong?