I watched it....and thought it was boring, though much better than Madonna was last year, but I don't care for Madonna so probably not a good comparison. I wasn't offended though.
I don't think she lipsynced, only because she didn't sing very much, and halfway through, I thought she sounded awfully winded. Dancing too much to catch her breath and sing. Dancing was good - for what it was. A choreographed stage show - everyone was in step, and not a movement out of place.
Not sure who the halftime show was supposed to appeal to, but since the Super Bowl attracts people of all ages, both male and female, and all around the world, I think they could have picked someone more universal than Beyonce. She can sing, but her songs are geared toward a younger audience. Her attire was typical of what she usually wears ... too small and revealing. M's comment? "Geezus, she's got thunder thighs and a fat ass!" (he's used to one considerably flatter!
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