Canon has used USM in all kinds of lenses, too, regardless of whether it is ring-type or not. Sigma uses HSM all the time when it is micro-HSM.
"quiet and fast" is marketing talk and that is no proof that a ring type motor is being used. Do you have full time manual on the 18-55 VR?
The point was "is it using a SWM" and it is using an SWM, and not a traditional micromotor
The 18-55, 55-300 and 55-200s are the only ones that lack FTM to my knowledge, the 40 macro does have FTM from its M/A designation, which is manual priority autofocus, read: Full time manual override
Also shall i point out i own the 18-55, 55-300 and 35mm f/1.8 and i know how loud they are? Heres a hint, They're as silent as my 15-85, 100-400 and 100L 
-edit- Sorry if im sounding harsh or nasty or anything, im really not meaning to


