That's almost what they seem like.:smiley_th
One guy I ride with most (on street & dirt) has commented on how long I've had them on, since he's changed his tires atleast twice in the same amount of time. Granted his is a different bike (Nighthawk 750) but our riding styles are very similar.
I believe I had Bridgestone's on before, and like I said, they didn't last nearly as long.