In reply to Mark (Yanosh) Muir:
It's swings and roundabouts.
If you are tall you can reach further. This can be a tremendous advantage.
If you are small then the leverage on your muscles is less so you can do things that taller climbers would need more effort to do. There are also some moves that involve getting your feet high that short people find easier.
Seeing as there is nothing you can do about it, don't worry. There are representatives from both the tall and short in the league of very good climbers.