Scrolling is configurable for anyway you like it in Lion. Mac OS X is highly configurable.
The default configuration has changed because most people on Macs now use a Trackpad instead of a mouse. Does your Linux box have a Trackpad? Probably not.
Here is how you change the scrolling:
1. Go to System Preferences: 2. Go to the Trackpad tab: 3. Configure scrolling the way you want. Notice that there is an animation on the right that will show how you have the system configured and will reflect any changes you make to the configuration. Does your Linux box have a video like this to show how you have the system configured?
As for scroll bars, you can configure that as well:
1. Again, go the System Preferences.
2. Select the General tab.
3. Configure it the way you want:
Does your Linux box give you this variety of configuration options?
Yes, my Mac has a trackpad. I have not yet installed Lion on it, so I don’t have to deal with the scrolling direction issue yet.
But, yes, you can configure a *lot* more in KDE than you can in Mac OS X. The argument from the Mac partisan would be that there are some things you shouldn’t be able to change/configure, but I disagree.