56k (Bits) modem only got between 5-6K(bites) 66kb(bites) through your network is acutely pretty reasonable.

Back in the day ISDN, X2 56K B Channels or X2 64K B Channels, and the luxury of instant connect

was a real treat @ 12 to 18Kb(bites) of raw speed.

I'm not 100% sure, I think the Mac Con Ethernet adaptor in my IIsi was getting 120kb 130kb

that might have been though a FTP transfer from my server in my local network though.

Crap now i am going to have to lug it out.....