I've been gearing for 8%, and when I have that 8%, have not been missing any attacks. Recently dropped a little below that, so I miss on occasion, but I think it's safe to say that it is 8%. Either that, or when I go Ret, I'm just really lucky =P
As for news: it's a little late, but our guild was finally able to take a couple trips into 25Naxx (with a few PuGs). I must say, I was not prepared, lol. Not because it was more difficult, or anything like that, but OMG the lag in 25 man is TERRIBLE!!! I don't lag at all in 10 man, but 25, with all the AOEs going off - I could barely do anything half the time. First time there we got through all 4 wings except Thaddius, cause people were getting tired. I missed night 2, and go figure, Last Laugh dropped :(. My second time in there was just for the last 2 bosses, and I was smart: disabling all my addons (except the raid essentials ;) ), and that seemed to help a lot. No Last Laugh or <insert name of uber shield that escapes my memory right now>. Still, was a lot of fun, and imo a different experience than 10 man, even with most fights being exactly the same mechanic wise.
Heading back today, so let's see how bad the lag is this time :)