It was a 14 mile journey that usually took between 50 and 55 mins, but only 55 when I was in bad traffic, after stopping weekday beers I got down to 45 on a far more regular basis, sometimes breaking that barrier. I have my data from the old Nokia Sports Tracker site somewhere I'm sure i could dig through. As I left at a set time and had to be at work at a set time I had to push myself to make the time up, it just became easier (or harder) based on my drinking the night before. Even single pint was and is noticeable.
These days I have a 10 mile commute that take 30 on a perfect cycle in, 35 on a slow day and 40 when I've not been eating enough carbs at the right times. But I'm much better at planning my meals now.
For me cycling is an amazing way to start and end the day, just thinking about the road and making my Strava segments as quickly and safely as I can. Find me as liamjford on Strava if you use that.