About Latency
Modem over Telephone lines 9600 baud = 9600 Bits/s
1 Byte = 8 bits >> 8 X 100 usec >> 800 u sec
A 1 MHz Clock Processor does 800 instruction in this time.
1 Peta Byte of data needs 1 10 sec or 3 Years to transfer
Latency is only important as it gets large
in relation to the transfer time