I'm not sure if this is a 25 man issue, or everyone is having a problem but ...
Using stampede at any time other than the pull makes several people in the raid get lag so bad it's unplayable for them. It's happening on the platforms, and in P2. It's happening in both BM and SV spec, it's happening if we are using stampede glyphed or not. It's happening even if just one of us uses the ability. We even turned off all the pets buff abilities so there wouldn't' be extra "stuff" happening. It appears to be an issue on a variety of computers including a raider who has a brand new higher end one. It is not lagging either of the hunters. Out of the 25 people seems like 3-4 had a problem.
Anyone else having a problem? Anyone know of a solution? I know some hunters that lurk here have done (or are working on) this fight...Really sucks not to be able to use that ability.
EDIT... just saw this post from a few weeks ago, but no one seems to really have any answers... sorry to start a new thread, probably should have necro'd that one.