Can't say on average speed comparisons because with all of the variables it's practically a unique situation based on the rider, the bike, the route and conditions. I think that the best way to judge is to join a group ride, or if that's not your thing then look at Strava segments - the middle range, not the top ranks which aren't representative of pretty much anything.

This year I've finally decided to start interval training and deliberate hill repeats, to try to improve my speeds.