Within 3 months of Makeb, yes. However, if you count the time S&V was on the public test server, it would be more like 4 or 5 months, and if you count the time HM TFB was a level 50 op, it would be more like 10 or 11 months, until they had to wait until their NiM versions. Also, EC had to wait 7 or 8 months for its NiM version as well. So the wait for the Oricon NiMs is not out of line at all. Especially compared to EC and TFB.
Both TfB and S&V NiM were also on the PTS for several weeks before their release. They got substantially more difficult when they hit live, but they were there. But let's just focus on when things hit the live servers,ok, since most people don't bother with the PTS.
In both the TfB and EC cases, while there was a long delay before their NiM releases, there were also new ops (and new levels of gear) to do in the meantime. TfB HM came 4 months after the release of EC HM, and EC NiM was out 3 months after that.
Sticking to Bioware's 9-week schedule means there will be game updates in August, October, and December. Since they are already hyping 2.8 as "their biggest update yet", August seems likely to be a minor update. I'm guessing/hoping the expansion will be in October. But that means DF and DP will have been out for one full year. Never before have we had to wait a full year between brand new operations.