1900RPM headspeed yields better results in headroom & efficiency. This video sounds very different compared to the leaf blower video. Changes include Vbar Gov, 13T pinion, and Turnigy K-Force HV120 ESC. Flight time is the same (up to 6 minutes).
3G Head
I decided to go with the Align 3G head since parts are more readily available, and since the arms are further out from center for better resolution. With this head and using inner holes on the levers and servo horns I am within the Vbar's sweet spot parameters within the software.
Update: This head flys great and actually autos better with noticeable hang time. And the arms are just the right distance from center such that I didn't have to change my Vbar swash settings at all for the 8* cyclic and 13.5* collective pitch. It simply flys really really well with Vbar 5.1.
When talking about electrics we must compare with all these details combined:
1) Same size class of helicopter (90 vs 90, or 600 vs 600)
2) Comparing the nitro version with a high voltage battery supply (10s or 12s) electric version.
3) Using today's technology batteries (G3 and above). i.e. 6C charge rate or higher, and using a higher quality battery such as ThunderPower, Hyperion, etc.
4) Proper gear ratio and headspeed RPM on the electric.
5) Did I mention a high voltage setup? Particularly a 12S.
Any less than that there isn't much of a valid comparison. These points above are where the electric pilots are getting their facts and figures from.
Don't have a 600 or 700 heli? You may be out of luck unless you can create a comparable high-voltage setup. Otherwise don't expect much out of the little electrics.