Is short an excuse?

So I'm barely 5'3". Barely as in not even. Sometimes I like to use that as an excuse for my lack of speed. Oh, and couple shortness with long torsoness and I have double the excuse, yeah? Um, yeah.

workout for 2-12-08
I read somewhere that working out hard is better than working out often, I need to work harder even if it's less often in order to meet some goals

Speed Play Interval Day
3 minutes @ 3.5 mph
4 @ 3.7
2 @ 6.0
1 @ 3.7
2 @ 6.2
1 @ 3.7
repeat 3 minute cycle
2 @ 6.4
1 @ 3.7
repeat 3 minute cycle
2 @ 6.5
1 @ 3.7
2 @ 6.0
1 @ 3.7
repeat 6 minute cycle
2 @ 6.5
2 @ 3.7
1 @ 6.7
1 @ 3.7
1 @ 6.7
3 @ 3.8
1 @ 3.5
Stretching

Gravitron asst. pullups @ 66lbs
dips 3 x8, pullups 1 x 8, parallel grip PU 1 x 6