As much as I'm enjoying this, speeds 9-10 destroy me. I struggle so much at that rate. The furthest I've been able to get on Mystery mode is 95. So yeah, I'm kinda sucky at Tetris, LOL. It's still a blast though.
You're better than me. I fell apart fairly often at speed 7 (from the demo). I probably won't get this until 6 months from now or so I guess, too much stuff in the backlog, and will wait for a price drop.