This is the way that Mac OS scrolling with a boring old handheld mouse works (as opposed to fancy soap bar and multitouch mice): The more and the faster you scroll, the further the mouse scrolling goes.
For instance, if I scroll one little tick on the mouse, the window scrolls a tiny amount. However, if I scroll twice in fast succession, the window scrolls a small amount once and then a faster amount the next time, etc.
Ubuntu has boring old pure linear scrolling. Is there nay way I can enable the Mac OS scrolling?