I haven't seen a comcast commercial in 5+ years. Sides even if they stopped it, that does not change the fact they are LIARS when it came to the internet. Just because they stop saying it don't make it any different, now the "UP TO" is the other bs language. Um, if you say "We offer speeds up to 100 mbps" and all you get is 10-30mbps what do you think? Oversell and under-provide seems to be the common way today.
This is DEPENDENT on location, amount of people on the node, and bandwidth management. It is a huge variable to have as advertised speeds. I used Comcast for a short time, I canceled service and went to CLICK! in Tacoma. They had more consistent speed than Comcast did back in the late '90s early 2000. It is because when they took over from AT&T there was so many splices in the line that it caused ... issues.