OK ...I've been playing abunch of little pieces for few months and it occured to me that I could probably do my 3rd grade exam. So I measured the tempo of all the pieces I play and some of them are faster than the marked speed, some slower, and the slower ones are all within 10% of the marked speed. That's OK isn't it? 110BPM vs 120 etc.?
Now I just have to work on my nerves.