You're ignoring the root cause of this discussions. Which service that you're listing has a 'real name' policy?
Skype: Pseudonym (this one)
Twitter: Pseudonym (the same)
Reddit: Pseudonym (the same)
AIM: Uhm.. Nope. Guess allows pseudonyms? Not sure
GMail: No restrictions either
G+: Same as FB, hopefully the next target on the list of this group.
So - most of your list aren't playing that 'give us your real name and be prepared to hand over your ID to prove that fact' game with their users. Which is what the discussion is about. Of the services that do this, FB clearly is the leader. Or in a monopoly-esque situation.