Browsing this website whilst traveling on 3G/4G has been a painful experience today and painful in a way that I've not experienced with other websites.
Problems seem to be fonts.google.com (why?) and various ads. For example, at the start of the day I could not even open the first page in "New feature in Canon 5DIV" thread at all. I could get to the 2nd, 3rd or 4th page, but not the start. Even the main page is slow at the moment.
I don't know if it is Chrome or Chrome on MacOS or the combination of these and 3G/4G but whatever it is, maybe someone should look at fixing it and optimizing the website.
Meanwhile I'll look at what sort of ad blockers I can get for Chrome so that it doesn't reach out and get hung up loading so many other silly websites.
Update: installing adblock on Chrome fixed the problems.