Ahh, yes, that Bkool draft. Up until now I have been under the impression that Bkool draft in races is there, but it just worked in a peculiar way: both sharing the load, neither feels that it's getting easier but both going at a higher speed.
I'm beginning to think that maybe it's not there. Maybe the increased speed is caused by the on/off thing, while we sprint/ease to get in a draft position.
Drafting was definitely working for me when I was with Rick and Bill for part of yesterday's race. I'm not saying it was easy to get right - far from it - but there was a noticeable affect when I occasionally randomly got in the right position for a bit. I think the speed doesn't drop off as quick as it should when you back off, which is why this on/off thing works, but also why you fly past someone you've just chased down to get into their draft - and the drafting affect exaggerates this even more, making it really hard to get your approach speed right without going past, even if you completely stop pedaling.
I guess things like this show how hard it must be to get a software algorithm to to accurately replicate real world physics!