Well today I was maintaining 23mph comfortably, not even trying to go fast, before I casually glanced at the bike computer. When I pushed hard I got up to 29mph, on level ground. That was motivating. I'll be up to 30mph in no time. I should be in good shape. Thanks for all the replies, I'll have to go through and read all the links. And once I start group riding I'll improve a lot. This is just about week 2 of owning a road bike, so there's plenty of room for improvement.