The only claims I see are better performance, better looks, and correct fitment.
Looks: That's all subjective isn't it, but IMO big tires look nice.
Performance: Kind of hard to judge this, but I can offer my experience. 2 weeks ago I was riding Infinion with a stock rear rim and 180/55 Pilot Power 2ct tire. It was...fine, nothing wrong, had a blast. Yesterday I was at Infinion, with my blingy GSXR rear rim, new 530 chain, and sexy 190/55 Power Race tire. I shredded it all over the track as the picture posted above will attest. I loved it, it held all around the track and it was a cold day. I know it's not a one too one comparison, race tires are always better on the track.
So what is there too say: I've chewed through 4 sets of tires on an SV1K. Metzler M5, Bridgestone 016, Michelin Pilot Power, Power 2ct.
The new set is Michelin Power One in front, Power Race in back. It feels different, planted is a good word, or, for our UK friends; simply brilliant. Want me to compare the feel to some other bike I've ridden, ok. Like a slightly heavier Ducati Streetfighter with lower bars. All is my opinion, to be taken with a grain of salt, but my ass likes the new size, and I won't be changing back any time soon.
Fitment:
Here is a pic to show the chain alignment, dead on if you ask me. Sorry about the pic quality, in person no left or right deviation can be seen

The GSXR brake rotor lines up perfectly for the stock caliper also.
Were there any other claims? More proof of it's trackday viability maybe; here ya go: