A great rotating paceline will alternate its rotation based on the wind, so the guys pulling off are blocking the wind for the guys moving forward.

That said, what is often lost about pacelines is that weak riders still help the group. If everyone is taking a 30-sec to one-min. pull and you can only give 5 seconds, you still help the group by providing a body for riders to hide behind in the group. So, keep that in mind.