BTW I did my own tests last week in a GAF thread (I think I was the only to show real results).
Pictures
Internal: 200-400k JPEG
After upload to Twitter: 50-100k JPEG
Sto the twitter did a hell of compression over the original PS4 picture you see on PS4 but the PS4 picture is not good enought yet... needs some lossless PNG option (2-4MB pictures).
We needs more sharing services too.
Video
Internal: 8 Mbps (1MB/s) bitrate
After upload to Facebook: I can't check but the video on PS4 plays with way better quality than Facebook (Facebook again did a hell of compression over the original)
8Mbps bitrate is not bad.. it is half of most Blu-ray movies quality but the lack of options to share and the heavly compression of Facebook is killing the video on web... I don't expect YouTube to solve that because it have low quality videos too like Facebook.
We need some high-definition sharing service or the hability to export the videos to PC (already planeed to future update).
Sony needs to give us options to record 1080p and 60fps videos too.
So far it is a good start... needs to improve.