I have been using Flickr for a while now and really like it, I have about 10,000 picture hosted there.
I have ran into problems with timing out when I am loading a group of pictures. Most pictures will load but a few will time out, then I have to note which didn't load and load them again. Irritating, but just a little bump in the road I've encountered loading pictures in recent months.
More frustrating is that although most load for me, the metadata for many of the pictures that load doesn't load with the pictures. I can't look at these pictures and see that the picture is one I named "11-15-16(45)" for example, which makes it harder for me to find the original image stored on my computer if I later want to find it so I can edit it or post it somewhere. Until recently every picture would include its metadata when I uploaded it, and now more often than not it isn't there.
Have you been running into more severe timing out issues than what I have had?
