indyank - 2:17 am on Aug 24, 2012 (gmt 0)
the question really is on this...
or linked from a separate page with minimal text
So how are you handling those pages (image attachment pages)? Are you adding "noindex" or using canonical tag pointing to the parent page?
The practical benefit is that I don't have to decide which search engines go on the Allowed Exceptions list. Users can always see the tiny picture; to get the full-size version they have to go to the page.
so you aren't even allowing the search engine bots to see those large images and that would mean you are preventing them from indexing those large images.