I have recently bought a Logitech M510 as my main mouse switching over from a magic mouse. I didn't realize missing horizontal scrolling would be such an issue, but apparently it is.
Now a mac does support horizontal scrolling by holding shift + scrolling, this is however amazingly slow.
I have the Logitech Control Center installed, which offers a few extra options, but nothing regarding the horizontal scroll speed. The scrolling speed options offered there only affect vertical scrolling.
Can the vertical speed be one setting and the horizontal speed another?