I have not been to the Electraflyer website for a long time now, so this may not be accurate anymore.
The original Electraflyer trike and Electraflyer C did use the Perm 132 brushed motor. There is no way they were "modified" as sometimes claimed. They might be working on developing their own motors now.
Regarding the speed of the Electraflyer trike, I believe they use the Stratus 17.5 wing. Here's the link to the wing specs from the manufacturer of that wing. Typically you fly within the trim speed range, because it's efficient. http://www.northwing.com/stratus-wing.htm
I can't wait until these are reliable, affordable, have decent range, and are in common use. Way better than 2 stroke ICE in my opinion.