Summer performance tires are designed with exceptional wet grip in mind, and will definately out-perform an all-season tire in this respect. The only thing you need to keep in mind is, as mentioned above, hydroplaning. It is the wiiiide footprint that increases the chances of hydroplaning, especially as the tires wear down. Otherwise, performance tires can channel more water out of the treads then typical all-seasons. In general, be aware of large pools of standing water at highway speeds and you'll do fine.