....
Yes, waving at a Passat thinking it was a Mk5 R32 has been mildly embarrassing at times! Especially when doing the proper "V..W" wave : -

Is that the proper VW wave? Looks to me more like the 'ROCK' devil horn wave,
Whenever I was on the VW rallys in my bug it was thumb and little finger with other fingerssquashed up, like on the badge,