I have a Rocket M2 mated to a 120 Sector with approximately four consistent clients accessing it. All have strong, -25-32 dbm SNR links. None are able to achieve truly consistent LQ or NLQ to the sector and, as would be expected with this the throughputs vary.
I have run wifi scans both at the 10Mhz that the nodes are running on -2 as well as on the 20Mhz to see what might be interfering. As would be expected, there is traffic out there on the 20Mhz width with some being on channel 1 though channel 1 is not a factor at the Rocket/Sector end of the link.