I had to retrace my steps to remember how I got to that link. If it doesn't load for you try going to the Sonnet page with the Encore/ST G4 Duet details:

http://www.sonnettech.com/product/encore_st_duet.html

and click on the "Reviews" tesk/link and it should take you to the TidBits page with the article/review:

http://db.tidbits.com/getbits.acgi?tbart=07884

Addmitedly, Sonnet put the link there because it was positive about their product. But the author does have some good information. I can also confirm his comment about the PowerLogix dual which reverts to single processor mode in OS9. PowerLogix says as much on their site.

Yeah, I'll be going from a 733hz single to a dual 1.2-1.3hz. I'll have to remember to buy my Depends in advance.