Ben Bradley wrote:

snip

What could be a real problem with 1000 feet of cable is high
frequency rolloff due to the capacitance of the cable.

Hmmm... Everybody's been discussing the propogation delay aspect of
the question, but the phase shift introduced by the RC filter that
results in that HF rolloff is far more significant. At frequencies
less than 1/10th that filter's corner frequency, the frequency at
which 6 dB of loss occurs, the phase shift is negligible. The shift
is 45 degrees at the corner frequency and grows to nearly 90 degrees
at frequencies about 10 times the corner frequency.

Depending on the signal's source impedance and the cable's capacitance,
then, relatively short cables can result in appreciable phase shift.

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Michael Kesti | "And like, one and one don't make
| two, one and one make one."
| - The Who, Bargain