In this case do you mean the firmware being provided by Linksys for the hardware, or an additional layer of firmware embedded into the wireless hardware in some way? It actually looks like for the Velop they are using some form of OpenWRT it looks like from what I can see when I pull up the sysinfo page in the router so it makes it seem like they would have the ability to customize/tweak the buffering settings in some way (I took Georgia Tech's Networking class about two years ago now, but it was pretty neat to learn about the buffer bloat problem there in that course and how they were mentioning bigger buffers weren't necessarily better for performance).