I was testing what I could do on this empty bike path and was doing about 27 and putting out 200 or so watts and this guy was drafting me I got a kick out of it. I have also been passed by guys going 28mph on road bikes. but Now hills are not a something I fear its still work but its possible now. this Hill is around 22degrees and a real bear even on my e bile. my first bike with a bosch motor I could just make it up putting out 450 watts and could only sin at 30rpms. but the new bosch motor I did it doing 540 watts and could get it upto 60 rpms. though it really killed me and got my heart rate to 165. the whole climb to it is 14 to 16" % grades 900 feet of climbing in 2 miles or so.
there is some physiology at work here too if I am not feeling as energetic as usual and I go from the second to the 3rd assist level yes I go faster but I can usually put out more watts too. it just seems easier.