Using the Castle Creations HV Phoenix 110 and a "servo tester" (the knob) and at 12S (44.4 volts). I topped out at 38 mph but generally seemed like it was mostly cruising at 35 mph. That's with me sitting directly upright. The controller was barely warm and the batteries which were enclosed in a bag were barely warm too. I actually rode it full bore for about 10 miles and the batteries were far from being discharged - I'd venture to say about 1/2 used up? During some preliminary tests, I ran it at 6s (22.2 volts nominal) and I'd get roughly 1 mile per 1 ah. When I had the 6s3p packs, I could almost go 40 miles per charge at the max speed of about 22 mph - this was extrapolated. I have a watt-meter hooked up to it so I could monitor voltage, amp usage, etc - you have to be careful not to overdischarge Lipolys.
Stay tuned for some pictures....