Redeemed:
Have all your Linux OS's been Standard installs, or did you try any speed tweaks?
The reason I ask, is you can tweak any portion of your Linux and see significant improvements in performance.
My first permanent Linux OS (UE1.2), I tweaked to the max looking for very specific improvement,
and was rewarded with a noticeable difference in:
1) improved boot time. (~30 sec from button to complete load.)
2) Apps loaded notably faster. (don't remember the benchmarks
)
3) Apps ran faster. (Again didn't save the benchmarks)
4) Improved read/write.
By that time I was already sold but wanted to see what I could squeeze out of it.
As with any system, You can make it faster but it's nice if it's fast to begin with.
Is Ubuntu truly slowing down?
Do a little
Informed tweaking and see for yourself.