"River" effect during big races

[Newcastle]

Curious about how much effect the the "river" created by a large group of paddlers has on speed. Not talking about drafting, but the track made through the water that 90% of paddlers take in race. The water is pulled along creating its own current. Even a quarter mile back from the unlimited boards you can feel it pulling you forward if there a 50+ paddlers in a race. Did an open ocean 15 mile race this weekend and stayed outside of the "track" by at least 1/2 mile. I could see the whole pack moving together against wind and current. Wondering what people think the speed difference is? Half of a mile an hour? More?

[PonoBill]

It definitely there. though the chop and wanky wave effect probably cancels it out. I try to get out of it and paddle in smooth water.

[gorgebob]

I agree with Bill . The massive chop and wash takes away any advantage . go for the smooth water of to the side at the start. Keep an eye on any trains forming and be ready to hop aboard.

[PonoBill]

On the other hand, don't discount local knowledge, there are all kinds of currents that can make a HUGE difference to a 5 MPH craft. The pack might be following the guy who knows where the magic current is. I've been in situations where I thought the "pack" was doing something dumb and went off on my own, only to find myself moving quickly rearwards in the order.