If a cat is born and kept in a dark room during it's infancy, it will grow up to be blind... it's a metaphor, but you don't know what you don't know. So try it out, understand how it works and then you can make a proper appraisal. I guarantee you will think every other means of scrolling is inferior...
For example, I can scroll (smoothly) in every direction, that means diagonally and in circles, whichever way my two fingers want to go on the trackpad. I can accidentally rest a few fingers on the trackpad and, click down with my thumb and move one of the fingers and I will successfully select and drag my selection, try that anywhere else, Linux does not support this even on the Mac trackpads, although they are making inroads...
I have successfully installed Ubuntu 11.10 on a MacBook pro and it works great, you can triple boot Mac, Windows and Linux, so at this point the trackpad issue is a software problem for Linux to solve.
Tried to switch to Apple hardware, actually. Got a lot of hate towards them. Sensitivity is good, but precision is awful. Mouse has strange dynamic, leading to irrepeatable behaviour.
I'm genuinely surprised that Apple turned me away by having lots of small details done WRONG.
Been using a MacBook Pro for over a year; this will be the first and last Mac I intend to use for either work or personal activities. I miss the Thinkpad TrackPoint every time I'm forced to use the trackpad on the Mac (or any other laptop, for that matter).
Whenever I'm using the MBP trackpad, I feel that it's meant for people who don't stay near home row because the wrist motion of displacing my wrist/hand is incredibly wasteful. In the case of my Thinkpad, though, I can much more easily transition from clicking around to typing something up.
Had to use one for months, went running to the better sensitiveness of my eeepc from Asus (model 1000, when they had quality parts) and the think pads clitmouse (i use touchpad there only for scrolling, all the area is a scroll wheel)
i think you are mostly comparing apple drivers to windows drivers.
The question is clearly about Linux. Where there's no such thing as bad scrolling implementation