I wget a 1GB file from the Debian GNU/Linux server (apache2). It is the average speed, not peak. The system is a PowerBook G4 1.67 with gigabit ethernet.
The actual average speed varies a bit: it's between 40-45MB/s for the whole 1GB file (it could the other load in the network perhaps?). Peak transfer speed is around 50MB/s (as reported by Network Statistics).
The final LAN performance depends on multiple factors and obviously doesn't necessarily mean everyone will be getting similar numbers in the end. Also, internet performance is completely another chestnut, that is when the adverse effect of latency steps in...
