Thank you and OK.
Could be config, but it was pretty stock standard and you can't change a great deal with the comparatively dumbed-down new user interface.
When we say "out performs"
what specifically do you mean ?
As mentioned previously my old 655 reliably delivers 100Mbps from the WAN source each time every time, whereas testing the 880L repeatably delivers circa 85Mbps from exactly the same WAN source ... from that perspective the 655 repeatably out-performs the 880L using real-world internet traffic
Don't want to buy an argument, just want to understand what is being said which is different to my testing experience.
Other people had reported the same WAN throughput experience (I think I provided links some time ago).
Maybe if you could replicate the testing
(cable 100Mbps source, cable modem/router, back end 655 or 880L WAN port connected to the same router's port, then multiple speed tested)
to compare results, that'd be fantastic.
PS also thanks for your previous double-NAT info http://www.practicallynetworked.com/networking/fixing_double_nat.htm (NAT'd router behind an existing NATing router) - in my case I do NEED a double-NAT to segregate networks and further protect the "inner" network ... double-NAT is not a bad thing if you know what you want and either do not care about UPnP and/or can well configure your routers yourself as well as know in which network to place individual devices.
PPS like you (I think) I bought the 880L for what I perceived to be "better WiFi" however I could not live with the internet (WAN) throughput degradation as compared to the 655 (I am paying $$ for a 100Mbps plan, after all), and so the 880L is currently a door-stop gathering dust on the floor of my study.