ANY new tire may be a bit more slippery when it is brand spanking new. it's got the mold release chemicals on it still, so you should take it a little bit easier on them, for say 50 miles of normal riding or a few laps on the race track, to get them broke in, that crap wore off the tire. This goes for all brands. When you are trying a new brand of tire you should go easier anyways because it IS diferent, you don't know how it is going to work for YOU. A brand new tire from the dealer is going to also be cold, no heat built up in it yet, that's not helpful either.
Ive seen this on the track, guy puts a new set of tires on, goes hauling ass out of the paddock, only to end up in the grass at turn 1, BRO, no you can't do that with new tires, you KNOW better!
Lonvevity, on a track weekend, forget it, ill burn a set in 150 miles. regular riding, ehh. they last me maybe 5 to 6k. Road conditions affect this too, if you got shitty rough roads, that eats tires too vs nice new smooth paved ones.
One thing I do want to point out to everyone, don't just look at the tread, that can be very misleading. Again, depending on your riding style, the sides in front are much more critical. My front tires can look great if you are looking at the tread, but look at the corner / edges and it's got a valley you can stick your pinky in and cords showing. You really need to look at the entire tire, and one thing i have noticed on my trailer, and while i am not sure if this pulls over to bike tires too but it wouldn't hurt to check anyways, the valvestems. They dry rot, sometimes in as little as a year. Especially in more tropical climates where the sun and uv are beating down on them hard all day, that'll tear rubber up.
Aaron