Hunter DPS question - how can we increase it?

Heya folks,

This is on behalf of my Wife. She plays an MM hunter. Here's her armory page. SHe has a couple more pieces of 251 gear now, though I don't know which slot they fit. Just be aware that the armory isn't up to date.

She attended a 25 man run the other day, her first one. Just to fill in as ranged DPS. She's never raided before in WotLK, only in Vanilla.

Her gear is far from fantastic, but she's working on it as best she can. As a note, she starts ICC 10 man with me on Friday. Guild leaders says she'll be fine in there and she'll get some upgrades too.

The thing is, the raid leader suggested that there were too many people not pulling 6k DPS. She was one of them. She's not raging over being called out on her DPS - simply wants to know how to increase it. He wasn't an ashole about it, just stating that he needed them to pull 6k.

With the gear she has, should she be able to do 6k DPS? We sat down and used the rotation EJ suggests on a heroic dummy. She's hard pressed to do 3k DPS. 2.6k was about the best we could manage to get her too. Focus issues were the general reason she couldn't get higher.

Her hit is capped I think, and so is her crit. Im not sure if she has too much or too little haste.

Basically, I want to help her get better and she wants to get better too. We don't know if it's a gear thing, or if she's just not doing a good rotation for MM. If folks could take a look at her armory link for gear, spec etc, that'd be fantastic. We'd appreciate any feedback you could give us.

TL;DR - My wife attended a 25 man dragon raid and was told she needed to pull 6k DPS. We tested on a heroic dummy and we could only get 2.6k DPS. Is the gear she has capable of pulling 6k, or is that asking too much? What can she do to improve her DPS? Link to armory is above where you can see gear and talents. Shot rotation is the EJ suggested one.

EDIT1: She's been using faceshooter to make sure her rotations are appropriate. The typical rotation she is getting from faceshooter is one she was already using. It tends to drop a particular shot which she was using before. She's recorded several heroic fights now and she's getting 4.8k top on those fights - which is a much bigger improvement. She'll keep using faceshooter for some time because even if it's the same rotation she was using, this is kind of like using a dot timer and it makes her concentrate on keeping dots up rather than a second or 2 of them dropping off the target. Basically coaches her into concentrating more than she does. We still think she can get her DPS a bit higher by tightening her rotation and perhaps making adjustments to gear.