Yes, however, I'm expecting Lumia's first (of course) and then the generic hardware phones like Blu to come very soon after...
Last December, 2014 when everyone was waiting for 8.1 GDR1 (Denim for Lumias) BLU Win HD 1st gen got the update in mid December ahead of many Lumia Models and those Lumias getting the update were still crawling out by Region. By contrast my Lumia 1520.3 did not get Denim until late April or early May, 2015 if memory serves me right
When 8.1 Update 2 was rolling, I was without a BLU, but my impression is that they got it earlier than most. Certainly it was waiting for me when I unboxed my HD LTE back in August and the first report of the Update 2 OTA was made here on the forum May 15, 2015.
http://forums.windowscentral.com/bl...ws-phone-8-1-update-2-just-pushed-my-blu.html
So BLU Win HD LTE got Update 2 just days after my flagship Lumia 1520 got Denim.
Microsoft does not do the OTA for BLU. They hand the RTM to BLU and BLU pushes it after testing. BLU might be testing right now. 10586 is delayed for OTA to Insiders, but I bet Carriers and OEMs have it.
I expect only a few Factory Unlocked Lumia models in some Regions will get the OTA before we see it.
I stand by my original guess:
My guess for BLU Win HD LTE... Rollouts starting December 19, 2015. Just a guess. Feels right to me.