[Mazin]

Yes but the sheer size of them chokes disk I/O. If they were stored locally, consider an average disk throughput of 20 MB/s. If each image is about 2 MB (2,000 kB), then you can read about 10 images a second, or less than half of a normal framerate. If they were stored on a server, as you say, consider a server throughput of 100 Mbps LAN - network overhead, so maybe 8 or 9 MB/s, and wonder why Premiere takes so long to load the files.

Also, consider this thread derailed.