I don't think it's a tip. It looks like smushed fondant circles to me.
AThis is circles of fondant folded I think.
AIt is ruffled fondant. You can get a similar feel with a big rose (bigger than a 104) tip, fat side toward the cake. I would practice first to get a feel for it.
I've tried this before using a circle cutter and kinda gathering the middle and then sticking on with water or sugar glue. I'd probably roll the fondant a little thinner though.
It's fondant circles gathered in a bunch and applied to the cake, agreed that I'd roll them thinner.
Also, check out this youtube video for making white chocolate curls. I haven't tried it yet, but it looks pretty easy.
If the link doesn't work just look up White Chocolate Curls on youtube.
AHi there, That's my cake, and everyone is right. It's made entirely from fondant circles. :D