I'm also very impressed in how the language is turning out. It's a pleasure to write and read. I know most people really don't like Unicode operators, but I find them to be very useful. They're short and concise, and allow those writing mathematical equations to stick to their regular symbols. And for those that don't know how to do Unicode on their OS/editor, there's ASCII equivalents.
Performance-wise, it seems to be fast enough for all my personal projects, and it's getting faster every release. Is there a certain piece of code that you want to have running within a certain amount of time? That would allow you (and Perl 6 devs) to have a goal to look at, and work towards.