i did two laps on my lunch break today and clocked both at 37 minutes, so yeah, roughly the same times.
when the weather isn't so blazingly hot, there's a bunch of us that meet up at 60th 'n 5th around 1pm to do pace line laps and then get pizza before heading back to our respective dork jobs.
pacing with other people helps, riding a road bike helps *ducks*, but a lighter wheelset, higher gearing and full kit are all valuable tools for getting quicker times around the park.
if you're lookin' to use the park for serious training, its good to switch back 'n forth between going out on multiple lap rides to work on your endurance, and doing hill repeats on the great hill to work on your strength.
hope to see you out there!