I have to say I haven't actually reported any yet... being a relatively new commuter I wasn't really aware that we could.
The thing is, the big ones aren't really much of a problem - I cycle mostly the same route and whilst they are very dangerous, I know they are there. Obviously I'd like them to get filled in (and will definitely consider reporting them now) but it's the general state of the roads that concern me - the uneven surfaces, smaller bumps and cracks that are not necessarily immediately dangerous. I'm convinced my bike is going to crap out on me because it's not designed to be rode on what is often similar to 'off-road' conditions.