Perfect. I now know how he acquired that information. There. Aside from the press site bad password, I can safely say all of his information is outdated/obtained early on in development.
Except the entire roster was decided on before development even started and, well.. if the guy had access to legitimate roster information he'd have..
* Known Villager's name right off the bat. Instead, he calls him 'Animal Crossing Guy'.
* Known Mii Fighters were Mii Fighters and called them that immediately, instead of just 'Mii' in the first leak.
* Known Rosalina was coming and added her to the first leak.
* Known Greninja/Gekkouga was coming and listed him by name. Instead, he calls him 'Pokemon from X and Y'.
* Not changed his original reveal of Palutena to Goddess Palutena. Why even do that if you got it right the first time? Weird.
* Known Sheik, Zero Suit Samus and Charizard were solo characters. Surely they'd have outlined this major development somewhere, right?
* Not shot himself in the foot saying there was internal debate about whether to keep Lucas or Ness, when Sakurai admits they figured out what they wanted to do two years ago.
* Released all his information at once and not in several pieces. That's shifty stuff right there.
Sorry, but considering they delayed Smash 3DS (no surprise there), there's stuff that doesn't quite add up for me. I'm going to have to go out on that comfy limb I've been out on for a while now and say 'He's probably got access to material lined up for E3.'. Then again, considering that press kits were given out for pretty much everything Smash related that pertained to announcements, I'm willing to consider Sal's leaker was actually press that got early access to that information.
Then again, still doesn't explain why he didn't get the names right. It's not a huge cluster**** of information that he has to sift through or anything, organization is pretty key. I also think we can rule out him trying to 'protect himself', because the reveal of Wii Fit Trainer and everything over two E3's was a damaging reveal all on its lonesome.
They did say they are still looking into characters.
If they're still looking at characters, guaranteed they're looking at characters for the upcoming DLC, if there is actually any and we're not having our legs pulled.