I don't think what you're seeing is out of range for performance.

My back of the envelope calculation tells me that your first transfer is roughly .8 megabytes per second, or 6.4 megabits per second. Slow but within reason for the type of files you are copying. When you move lots of smaller files, the speed of the device is greatly reduced. The Pogoplug has to index, extract exif data, and create thumbnails, which makes the transfer slower.

The speed for the videos (934 files) is also in line with what I would expect - roughly 9 megabytes per second, or 72 megabits per second - roughly 11 times faster.

Your configuration might also be slowing down the transfer a bit - that's a lot of hops. I wouldn't expect that to be very significant, however.

Hope that answers the questions!