How long do your appointments last?

I have an NHS dentist and I was in with him for around three minutes. A quick look at my old x-rays, a question about my medical health and then 30 seconds in my mouth (he said "I can't see any obvious problems") before he sent me packing. The next appointment was booked five minutes after mine. I fear that I may be getting shoddy treatment compared to the private patients. It still cost me £16.20.

On the plus side; I was still on time for work.