I've always been of the opinion(possibly wrongly) that the high speed of our "wings" leaves us unaffected.
Wrongly indeed.. If you havn't experienced wake turbulence you just havn't got close enough. I once took off from a heliport in a B206, next to an airport just after a 737 had passed by on short finals. My climb out took me through his wake vortex and what I got was a big thump followed by a big pitch up immediately followed by a big pitch down which certainly taught me to avoid it in future. Luckily I crossed through it at right angles to his track as if it had been behind him it would have caused a big roll one way then the other, which might have had a less fortunate outcome for me at low level..