some folks never drop the "red vs. blue" war. sigh.
MorphOS is an excellent OS. I'm selling my EFIKA due to lack of time/interest. Not just in MOS but in the Amiga in general, but thats a different story.
In my experience MorphOS runs great, even on my EFIKA. As for your "speed" question.. The EFIKA whips the "you know what" out of any Amiga (PPC even), just to give you an idea.
If you're not on the MOS mailing list, all seems quiet, but behind the scenes there's alot of debugging/work going on. Thats a great sign and shows the devotion the developers have to MOS. Piru's pic of MOS3 on the Mac Mini was just an example of how versatile the MOS Devel team is. MOS on Mac Mini will happen, its just a matter of time. You cant work on MOS2 and 3 at the same time you know. :-)