Yay I was worried about nothing :)

Test2:  Folder with 20 files, 6.14 GB of data.
Transfer started appx 11:02pm
FW xfer finished appx 11:07
Ethernet xfer still had 8 minutes left to go.
Images if you care to see, both are 1600x1200, link instead of embed.
http://videosean.gotgeeks.com/i/Ziggonet_F/Test2_001.jpg
http://videosean.gotgeeks.com/i/Ziggonet_F/Test2_005_FWdone.jpg
6 GB / 5 min = 1.2 GB/min Firewire 40% of 400 mbps (160 mbps)
6 GB / 13 min = 0.46 GB/min Ethernet 70% of 100 mbps (70 mbps)