My guess is that most people aren't, and didn't, but I'm more than willing to be proved wrong about that.
But I'll be surprised if it's a serious problem, because all we're doing is copying what sites like Flickr and Picasa and Photobucket do already - and they don't seem to have acquired a reputation for exclusivity.
If the thread loaded well for lower bandwidths, I expect it's because most people did in fact reduce the size of their JPEG files. There seemed to be a consensus about it - then some comments suggested it might not be worth bothering about, and the polloi could just use a collapsed thread. Which is what I reacted to.
So I figured people can discuss in the comments whether they have any problems with graphics and that will give a better gauge. Ad astra per aspera
