I ran some tests of my own on my Mid 2012 13" Macbook Pro. What did I observe? About 20-30 FPS in Lions Arch, and about 25 on WvW with lowest settings. Change a few things up like Anti-Aliasing and maybe medium animations and the FPS change is negligible, like -1FPS. It's actually impressive considering it has no optimization and I'm surprised that this is already being released. It's worlds ahead of Star Wars: The Old Republic though, hands down. A Mac release is a godsend! Mouse scrolling works perfectly fine on my Logitech Anywhere Mouse MX. Temperatures: I was getting about 40-50C, running iStat menus and optimizing fan control to the max, with a small fan right behind the exhaust, down from 68-80C on Bootcamp. Definitely a lot of room for improvement.
Oh, my computer specs? 2.9GHz core i7 Processor that can turbo-boost to 3.6 GHz, and HD Graphics 4000 as my graphics card. I also have a 256 GB Crucial M4 SSD.