[kamjam]

Yes, I've seen the "Upload in High Res" option in FB and usually use it myself - there is a big difference even viewing on screen and I've had some images grain very badly. I just checked the res is 2048 x 1366 - but I have no idea if that is good enough for print at that size. Guess it would depend on the image.

I very rarely print stuff these days but I can understand the convenience factor - I'm probably not your ideal demographic anyway since I very rarely print, it would not be that that inconvenient for me. Plus I only have one friend :(

[rcamera]

As I mentioned in another reply, if you upload in high res, and your uploaded image is big enough for a decent print, you will be able to print photos at 10x15cm without an issue. Any bigger of a photo, low resolution issues will appear.