I think part of the problem with non-believers is that it doesn't feel like your counter steering on some bikes... like a big cruiser going 5 mph.
A few months ago I switched from a Ver-sys (having other standards/dual-sports before that) to a Suzuki C50 (an 800cc "old style" looking cruiser - big tires, fenders, etc.)
When going slow the front wheel heavily turns the direction you're going, if you didn't know better you would think it's not counter-steering.
It's just a millisecond twitch that leans the bike over and then the wheel turns. I can see how some people don't think it's happening even though it is. I also think having big arguments about it is pretty funny.