Well I knew they had, but I didn't think they'd had any SERIOUS work done on it... though I shouldn't be surprised. BioWare and EA have been notorious for setting a release date about five minutes into working on crap. xD And they always get it in... usually with a bit disappointment. *cough* *ME3* *cough*
Honestly I wouldn't hold your breath for the Cathar. We were also promised SGRAs with the next story update, which is Makeb, but I'm almost 100% sure it won't be in there. They haven't updated us on it for... about six months to a year (other than saying, we have no new information, but let's face it, that's not new information...).