Test houses were introduced 20 days ago.. in March. So it DID happen.
NEXT update may or may not happen late March/early April, with big updates maybe happening once a month. Maybe. That was, at one point, at least the plan.
Plans change, of course. Mice and men and all that.
There was never a point in time when we were told February. In January we were told about 8 weeks for new content, though not exactly what the content would be. That 8 weeks would have ended March 7th, if I remember correctly, and we received new content the week before.
CDOG-Windborn said not to believe anyone who is not staff. The people saying late march/early april are getting those estimates from the chats with staff. Here's the one of the Staff Q&A compilations: http://www.glitch.com/forum/general/17386/