Exactly^. Those motors arent much bigger than the NeuCastle motors- neu and lehner ( to name but two... ) make motors that are absolutely gigantic and larger than a 1pint bear can...
http://www.acpropulsion.com/products-tzero.html
How about these fellas system running a brush less in full sized vehicles =)
Word is they have secured a BMW account for some new performance BMW electrics =)
If it wasn't for the $25K+ price ide try one.