[Bush2000]

I don't know how much clearer they can get: "Training will definitely be more detailed and will take a lot longer on OpenOffice.org because the interface isn't that friendly."

[Terabitten]

all testers liked Office 2003 and said staying with Office would likely provide the smoothest upgrade path.

I'm no techie, but I think that the above quote is what's telling here. They already have an Office product, and OpenOffice is a little different.