How long have you been biking?

When I started biking to work, there were a few hills that gave me serious trouble. I generally had to stop for a minute or two at the top to catch my breath. Most veteran cyclists wouldn't even have considered them hills (1/4 mile @ 2-3% grade) but for me they were monstrous. Within a year, it was no problem. Within two years, I could do that route on a fixed gear bike. Now (four years later) I'm climbing a 15-20% grade hill every day at the end of my 10-mile ride home.

What I would say is, don't worry about the numbers. If you want to improve, you probably can.

A computer with a cadence feature helped me a lot. I also found that reading advice on hill climbing really helped. One thing you'll see is that you should go up hills in a gear you can spin at some prescribed cadence. That's good advice if your fitness and the size of the hill are compatible with that thinking. I can't maintain more than 40 rpm in my lowest gear on my steepest climb. There are just going to be hills that force you to mash. Over time, the size of the hill required to force you to do that will grow.

FWIW, I can do my 10 mile commute in 40-45 minutes. A few years ago an easier route (about the same distance) took me about an hour.