Innova "plus" discs?

I saw that innova has changed the molds of a few popular discs and are calling them "plus".. like teebird+ and a star roc+.
Has anyone thrown these? what differences are there?

[Donny Olow]

A slight bit more stability.

[Nick]

More stable or more overstable?

[Ghost]

The TB+ is more overstable slightly. The Roc+ is actually LESS overstable. Less fade and a bit flippier.

[Ben Farris]

The rim is a little bit different. I have a teebird+ and LOVE it. It is a little more overstable like Donny said. They feel great in the hand. I think better then the normal versions of the same disc.

[Bruce Brakel]

Did they submit the +s for PDGA approval or is this the SL all over again, just in time for Worlds?

[Ryne]

essentially the rim of the disc has a slight outward taper that helps them come out of the hand more smoothly