Words, yes, but nothing definite (you've also made that point).

And the Wiki listing just makes me wonder why the MDD weighs that much when its immediate predecessor (the Powermac I have) weighs about ten pounds less.

So, yes, my Powermac (which isn't the one that's about to be supported - or at least not as quickly as the MDD) does not weigh 44 pounds.

Definitely at plus for the Quicksilver Powermac (that and greater compatibility with most third party CPU upgrades). There is at least one MDD CPU upgrade I know of, but if G5s are supported why would you spend that much money on upgrading a G4?