Are you running XP? Mine runs XP pretty snappy, like a normal computer. I find the main issue with the Mini and speed comes down to software. If your using heavy bloated software it will run slow. What Programs are running Sluggish for you?
There are also many posts about upgrading the hard drive to
SSD. Look on youtube, there plenty of videos showing netbooks on atom processors running fast and multitasking.
Speed is perceptual, one person's fast system is slow on another. Like how people think webpages load faster if they see something come up quick at first, even though it can take the same amount of time.
I usually run Windows 7. Even though it's a little slower than XP I like the look and features. The speed is still acceptable for me. Check the Linux threads as well, they say it runs Ubuntu Netbook Remix fast.