At 9600bps. Almost every device supported 115200 - that would cut it down to to 72 seconds. And as I mentioned - pictures were often small (20-30kbytes) back in the day - that's barely 1-2 seconds at 115200. And the later 4Mbps speeds would move that megabyte in 2 seconds flat.

You were pretty unlucky. The basic bitrate was 9.6kbps but much higher speeds were common.