Eh, it's not that hard... Once you can tap the beginning, the rhythm is easy, then it's just a matter of luck on the solo. Usually I get around 80%, and beat it if I'm lucky.
I don't have GHIII yet, but I'll be getting it for Christmas for my 360. I like GHII's soundtrack a LOT more, and I think Jordan is a lot harder than TTATF. Jordan took me months to conquer, TTATF took a week of going to my friend's place. Although once you beat Jordan, you pretty much always 5* it, but with TTATF, you can pass with a 3*. Battles are lame too.
Oh, and Red Lottery 100% and BATH 93%, along with a H18 92% today.