There is a guy in my town with a very tall track bike. He's got the seatpost fairly high, and the stem is like 30cm and or something extremely short and the bars are low, and he's got a 0 setback seatpost with the seat pushed all the way forward. When I see that I always picture a guy with legs up to his armpits, but apparently he is more normally proportioned than that, but just prefers a very short reach. In other words proper reach is both a matter of physical proportions, and personal preference.