yes, the 550 ti is normally slower than the 7770 (which is half a 7870)
the min CPUs is also BS, i5 2300 is much faster than the 945
it could beat the 975 (600MHz more) by a good margin
http://www.xbitlabs.com/articles/cpu/display/core-i5-2500-2400-2300_7.html#sect0
I can't remember a game ever coming out and people then saying "Oh, THAT'S why the hardware requirements seemed so bizarre, but now they make perfect sense." Makes me wonder if they select these points using market share (assuming they aren't just random projections made by monkeys tracking headless chickens) with the lower recommendation invariably set to accommodate 95+% of the potential market within each brand (even if the minimum hardware produces a slideshow) and the higher recommendation invariably set to make the game appear cutting edge as perceived by console-concentric developers. Tom's hardware's GPU hierarchy chart shows the HD7870 a whopping five tiers above the GTX550ti, yet the recommended GTX780 and HD 290X are ranked equally. I don't think it's possible to have a technical issue that has such a disparate level at the minimum requirement level yet vanishes at the recommended level. Same with CPUs; the i5-2300 is ranked at the bottom of the very highest tier, faster (for gaming) than anything AMD makes. Even the AMD FX-9590 probably isn't as fast as the i5-2300 unless there is something specific happening that greatly benefits AMD processors, which for DX11 seems unlikely. And the requirements don't even address SSDs, which it seems to me would have an enormous performance impact for a massive seamless open world.
I'm just really, really glad the current consoles are so similar to PCs. This should drastically reduce the cost and complexity of porting to PC, which should make cheapo ports more tolerable and better ports even better. Last gen, programming a game for the PS3, XBox 360, and PC was essentially programming three completely different games. This gen, the task should be immeasurably easier and cheaper, and that should translate to more profitable games (and thus more companies making games) as well as better games with more content, polish, and debugging. This should be especially relevant under DX12. Hopefully, this similarity will soon make such nonsensical hardware requirements a thing of the past. Frankly I'm surprised and disappointed that Bethesda would release these without some sort of clarification as to why the apparent gross disparities, or what level of performance is intended to be represented by minimum and recommended. Knowing whether the minimum represents a 640x480 slideshow or 30 fps @1080p is much more germane to the question of whether to update than is two seemingly nonsensical lists.