Unsurprised either

They are pretty much obligated by law to honor any request that comes with a proper search warrant.

Patriot Act requests are more fuzzy terrain, but precedent is that Facebook complies, Twitter fights, and Google decides case-by-case.

Now - their data retention policy is potentially problematic: you can delete, but for how long they actually keep the data, only inaccessible, has always been a source of questions. And how inaccessible? Is it encrypted? Is it encrypted but breakable from above?

And frankly, no site from America, Britain, Canada or Australia is ever going to be different, just because of the legal environment. You need a country with stronger privacy protections - or the opposite, with no laws on the internet. This is partly why I think the ideal "facebook killer" would have to be non-Anglo-Saxon - or at the very least, distributed in a Freenet type of network.