After having been told twice that there was not really anything to be done to speed up the WHM site, I called Go-Daddy again today to try to get improved performance before trying another provider. Now that I could direct the tech to the mirror site for comparison, he looked into a real solution and has moved the main site to a different, newer, less-crowded server, noticeably improving performance.
I may still change providers, since I’ve found one that allows shared hosting among multiple domains (which is convenient, since I have several domains to host). Note that nothing would change on the visitor side (that is, it would be the same domain name), it would just be served from a different server owned by a different provider.
Visitorship is back down to around 20,000 per day—which is still 50% higher than pre-election figures. With better performance, visitorship should go up a bit.
Also, thanks to these folks for helping to support the site financially….