Mike,
  I was writing about a person viewing albums rather than a single image (but I liked your tip on referring people to a single, uncompressed image).

   What I was trying to say (maybe not at all successfully with my post) is that GooglePlus displays have SOLVED the clarity situation because they allow the viewer to see different sizes depending on the viewer's monitor display setting and the web-browser size chosen in a way that does not produce the kind of blurry images that using the picasaweb-album-software does.  Picasaweb blurs EVERYthing now for the person viewing if it's not the original size.  But GooglePlus is doing something with an algorithm that makes ANY size produced by its software really clear!

   So I am hoping not to have anyone go to picasaweb to view its presentation of albums eventually.  Unfortunately, today I found that the default 'web' browser for my Samsung Galaxy S2 phone makes people go from googleplus album view to the picasaweb view of albums and does a sort of mobile view. 
  DOLPHIN web browser.however, allows us to stay in Google Plus's web album viewing.

  But the downside of Dolphin web browser: It actually produces an entire mobile-page view of thumbnails going down, accompanying the single-image view-- and of course that takes awhile to load.  That was startling.

   So someday I guess a google-plus android and ios app that doesn't confine us to simplest mobile-viewing will take care of that.
  I use my tablets and smartphone in desktop mode for all photo viewing sites but unfortunately it doesn't work well for google-plus's photo albums yet -- but I love the google-plus photo albums as seen now on a normal computer (and probably on a good tablet but I've not tried it yet).  Whoever did the google-plus album image-presentation algorithms is amazing.

   So, good work to google-plus team on its own web-album presentations.   And I'm hoping that all editing methods will show up in google-plus so I never need to go work in picasaweb mode.

Thanks again for that great tip on the '/s0' replacement in the single-image URL when needed.  Excellent single-image workaround.  I just wish I could specify 1024 or 1280 without seeing picasaweb's awful compression results.   But now we have google-plus's increasingly excellent display improvements.