I just switched from a PC to a MAC with Lion. There are a number of things that seem more difficult with a MAC, but of particular annoyance at the moment is that when I hold down the delete/backspace key, it still slowly deletes one character at a time. This is despite my having set the keyboard key repeat to fast and the delay to slow. This also goes for holding down a character key. On a PC, if you hold down a key, it will begin to repeat. The longer you hold it down, the faster it repeats. How do I replicate these functions on a MAC?