Ok, I found a .2 mile hill section with an average climb of 15% according to those 3 sites. Ridewithgps says that it hits a max of 33% grade, mapmyride says it goes up to 20% grade, but it doesn't go any higher at that resolution (the darkest color shown in map creation), and with the closer endpoints I fed toporoute, it says the grade is 20%.
Yeah, the hill was slow going. I was in the 2nd-lowest gear working fairly hard, and was going ~7 mph. I should point out that this is after a week of cycling; prior to getting the electric I'd not biked more than 5 miles in 3 years, and I've not run in 5 months or so.
Weight-wise, I had 150lbs (me), 47 lbs (bike) and 15 lbs of stuff (pannier with athletic equipment, water, and lock).