I race on 404FC tubies. It's not that they don't get pushed around in a heavy crosswind, it's that the push is balanced so that it doesn't create turning moment. I got the Zipp tubies because they are both aero and light, so I can use them no matter what race is on the schedule: crit, RR, HC... whatever.

The only issue I've had, and it hasn't been diagnosed beyond reasonable doubt, is some front end wobble at speed. The wobble is limited to the front wheel - it isn't that harmonic wobble that involves the entire frame. At high speeds, with the wind direction fluctuating, the front wheel gets a bit "skitterish". Enough that people have commented, and well, having the wheel move around at 45-50mph in a RR pack is a touch off-putting. I think it is the laminar airflow attaching and detaching from the foil. The wheel appears to seek a line through the wind fluctuations. I just had a new tire put on, however, and looking at the old one with no air, I don't think the glue job was particularly good. In fact, I got a clicking from the valve stem on the rim, and think that indicated a possible gluing issue. In any event, I haven't experienced the wobble on the new tire, but then I haven't ridden in the same conditions - crit's only so far, and without significant wind. So we'll see. But I love the wheels in all other respects. My training wheels are Bont Race XXX clinchers (paired spoke version), and they are also light and ride great, but I'll take the Zipps any day. If it weren't for the hassle and cost of tubular repair, they'd never leave the bike.