You're totally right and I'll shut up now.Lemac - may I give you some advice?
Whilst I would say you are above average - stop giving a shit about what other people may or may not have. Your GF (or ex) doesn't know shit about anything. Her obsessiveness about measurements is frankly rather childish. It's like not liking a peice of clothing unless it has a label that means you paid a big premium for it.
Just get out there and use it.
I hope you guys understand though what I'm saying about NJqt and how there are girls out there that are exactly like that. If I say 6.5" instead of 7", which doesn't make much of a difference at all anyways, a girl might turn me down just because she heard "6". It's ridiculous, but whatever I'll drop it now that I learned that lesson the hard way.
Thanks to everyone that responded