I am beginning to think the rumor about 50 max perks started with the February Game Informer Podcast:
16:12 Within the one-handed skill tree you've got these different perks for maces, and axes, and swords and so on. Within the magic system is it kind of similar, is it by school that you're perking up, or is it individually like I've got fire spells, and I'm going to perk fire spells?
"Well there's the school Destruction, so that covers like a category of spells, and then within Destruction there are perks for fire based spells. So people see we've removed Mysticism, but that's just a label right? Those spells go into other skills. And then it gets deeper within those skills. The easy thing for us is to just add more skills. That's actually easier. Because in the old games there was just a skill and a number, there wasn't really a progression. We really want you to feel that you're getting better in this particular skill. And perks are the main way we do that now. And I think the game right now has like 280 perks if you include the ranks. So even a character that raises all their skills to 100, and they're playing and they're level 50, they've only gotten to pick 50 perks. They're very different characters. And a lot of the power is in the perks as opposed to the raw number of the skill. There's still some power in the raw number of the skill, just not as much as there used to be. All that stuff has been moved into the perks."
49:14 Explain how the leveling system works, particularly in relation to the maximum level. What your philosophy is toward that, how long can you level in the game, when does it become basically impossible to level, etc.
"We don't code in a maximum level. There is a theoretical maximum depending on what your skills are. The one change we've made is that you level faster. We've sort of balanced Oblivion and Fallout 3 in some respects to like a 1 - 35, 1 - 30, so if people play for a long time that's the kind of high level with creatures and whatever. This one is balanced like 1 - 50, but it isn't longer in gameplay. You do level faster, a lot faster, especially in the beginning of the game. Because of the power in the perks, we wanted to be giving them out at a higher rate. The actual maximum depending on your particular character how it works out might be 75. I don't really know. I'm just saying we don't code in the maximum level. It will end up whatever it ends up."
"(Perks being more fun) It's the thing you're always shooting for. Even 1 - 50 it slows down a lot as you play. If you assume there's 200 hours of content, you can sort of figure out, 'how often do I get to level?' We think we can balance that with the perks. That's what happened. We did the perks, and we figured out quickly, 'oh, to make these work, we need to be leveling faster.' And it is more fun."
Todd was talking about explaining the huge differences between two different level 50 characters, based on the 50 different perks they selected.
Nowhere in any video interview, podcast interview, print interview or any other source that I can find has there been any mention of perks stopping at level 51.