>Something like a logo should be downloaded once and cached for a long time.
The cache on mobile browsers is tiny (4-85MB), your logo will likely only be cached for that visit. I'm finding sites claiming IOS didn't even have a disk cache for safari until IOS 6? So in that case it is certainly only getting cached for one visit.
Interesting point, thanks for sharing. I might do CSS targeting for site-wide images, and leave the in-post images (i.e., the ones coming via email & rss) with the high-res versions.
The cache on mobile browsers is tiny (4-85MB), your logo will likely only be cached for that visit. I'm finding sites claiming IOS didn't even have a disk cache for safari until IOS 6? So in that case it is certainly only getting cached for one visit.