You've quoted the 2 extra - a Samsung and DropBox account. I'm curious, if anyone knows what the nine are - or is this exaggeration?
I wouldn't crow about 'having to sign up the dropbox account'. iCloud is so poor for document sharing, even with (or especially with) Apple's iWork suite, that DropBox or similar is pretty mandatory for a lot of iOS users.
Edit: I guess Amazon for eBooks could be another one.
You don't even need to sign up for Dropbox for document sharing. Google Documents does it just fine under that single Google account.
And Google has a bookstore under the single Google account just as Apple does. :)