This tire was built to be a track day tire and will not perform as well on street conditions.
That is one odd comment.
I have been using power one (previous incarnation) and power supersports (current incarnation) for our 848 and 600 for both track and fast road ride, as well as commuting, and both has been and still is performing very nicely in all situation, including damp fast road and wet commuting.
In most situation, it even allows for knee-on-the-ground on damp ROAD, and that is while staying within your lane too.
Wears a lot better than supercorsa on the track too. One pair even lasted over 3000kms on the 600, with half of that spent lapping the track within 10% of top racer lap times.
The feel is not as communicative as supercorsa, but i'd rate it one of the best tyres I've ever used, and far superior than pirelli Rosso or Bridgestone S20 line (well, not exactly the same class).
Have you tried them before? I'd be interested in how you think it performs weak on the road. Was the pressure suitable for the road (which is different from track).