I recently found out that especially my forum pages are loading slowly (it doesn't feel like it for me, but google's webmaster tools mentions 5s and more).
I was wondering if this could be because user's avatars? The avatars are not hosted on my website, and some users have animated gifs or needlessly large images (>250KB).
Would it be a good idea to not load avatars when a search engine visits my website? I know they will then be missing from google's cached pages, but will it speed up my website, and perhaps improve my page's ranking?