I have a GX440 and recently applied the 4.4.4 software update and the MC7700_GCA001_35295 radio update. I am experiencing extremely high EC/IO resulting in bandwidth issues including high latency. Previous to the upgrade I was using 35205 firmware.
EC/IO numbers before upgrade were < -2 usually around -1.3, now I have not seen them lower than -5 and are averaging -8 to -10 all the way to -13.
I am in Canada using Rogers as a carrier.