I can honestly say this is the first ive heard of Roush and droning.... and i myself have a Roush. only gotten one complaint from all the different people ive had in my truck, but that was my sister who once complained to me that a tv on mute was making too much noise..... 
i will say there is a weird almost drone but only at like 62mph, so it doesnt affect me as im always above that anyway.

i will say there is a weird almost drone but only at like 62mph, so it doesnt affect me as im always above that anyway.