My issue has been somewhat solved since my laptop now reconnects to a xfinitywifi signal with great connectivity. The last, clear step that i took in hopes of fixing the issue was disconnecting from the signal completely for 24+ hours. Afterwards, I just connected to xfinitywifi and it turned out to be a much better connection than what i was previously experiencing.
Before I did the 24+hour disconnection, i was constantly doing the following: using wifi info programs to find MAC addresses and specific wifi info; using command prompt to reset/flush dns and ip configurations; reinstalling and configuring the wifi adapter software properties; and tenaciously researching internet forums and articles about wifi noise and related topics to my issue. I even bumped into eric your post a day after you posted it.
I dont know how long this signal will last for me. Im still not sure if it was the 24+ hour disconnect that did the trick but it seems as if this was my fix.
Very unsure about the following but I would be selective about any particular video streaming you are doing because it seemed as if my good connection would be gone the next day after streaming from certain websites. This has lead me to be more wary of my internet activity, in case certain actions would cause a temporary mac address ban from the better xfinitywifi signal (IF that is the case) but so far everything i saw suspicious that i did before has been in the clear.