I'm not sure if loading time is really an issue or not in terms of the number of images in a post. But I know that when I've forgotten to downsize images, I get some comments from mobile users. I wonder what the best image size is in term of pixels? Do you have any thoughts on that? I've been downsizing to about 1600 on the long edge, but maybe that's still too large? I try to get the images down to well under 1 meg each, but sometimes I forget...