Terrific.

Still, it would be quite increibe if a professor (or any professional) would describe oneself as "really average" or "truly awful at teaching"...

It brings to mind an apocryfical story told about many great classical violinists (the names change, the idea stays the same):
- I'm the second best violin in the world. - Oh really? But who is the best? - Oh, there are many: every country has its best in the world violinist.