Yes, absolutely. On all 5 different sites I manage in fact, two on a local ISP ADSL, third on local ISP fiber, fourth on Comcast Business cable modem, and even

Yes, absolutely. On all 5 different sites I manage in fact, two on a local ISP ADSL, third on local ISP fiber, fourth on Comcast Business cable modem, and even the fifth on a small regional WISP. All of them are reliably within a few percent of their expected speed with about the frequency that one would reasonably expect from that connection class. "Up-to" is fuzzy but quite justified with many technologies. Proper fiber of course is rock solid and essentially never has issues short of a backhoe. But ADSL falls off hard with distance, and a lot of the in-house wiring it's forced through is ancient garbage phone line. Sometimes one can get a huge practical boost just from shortening/replacing line with cat 5. And WISPs obviously have to deal with inclement weather fade as well as any additional obstacles for subpar sites that customers can't/won't rectify. Cable is more of a shared resource though you get much better support and less bullshit with business class even though Comcast are bastards. Now, I absolutely would love to see it mandated by law that somewhere upfront in ISP info to consumers it's required to have a standardized SLA. A consumer-level SLA for sure, but still have it formalized and cover all of the basics. So not just absolute max bandwidth, but 90%/50%/whatever bandwidth, any guaranteed floor, 90% latency, any data caps, any throttling criteria, etc. All categories the same and measured in a mandated standardized way so universally comparable. I don't expect data center level SLAs at all, but there isn't any reason there can't be that level of clarity. But residential/SOHO and such service inherently has more uncertainty and more compromises and capacity multipliers to meet lower prices. I think that's ok, just that it should be laid out and not buried in some fine print or support page in the disused lavatory defended by a leopard either.