Mass Effect 2 has "Sold" 6.6 MILLION (Probably means shipped) -- Fantastic!

[Scoobes]

Dammit Darth you beat me to it!

Anyway, it does seem likely it's both ME 1 & 2. I don't doubt that PC sales boost the total up significantly, especially with digital downloads and the wholse Cerberus network thing they've got going.