Less scientific but with my old MOTU Ultralite III, ASIO, I can run Sonar at 64 samples buffer with a reasomable project, but CbB drops out on the same project almost immediately.
A real shame as this would have been an obvious way to do what was needed for Next/Sonar interchange and not be left behind (cf. lagging VST and ASIO support). So it'll be twice the development in due course.
Changes action of cursors from moving from cell to cell to moving the worksheet. And a complete PITA it is too when you hit it by accident and then edit the wrong cell!