Camerahacker has a chart that shows lag specifications for various cameras based on manufacturer specifications, or other published sources. Nominal times for Canon cameras include:
Canon EOS 10D: 80 ms
Canon EOS 1D: 55 ms
Canon EOS 1D Mark II: 40 ms
Canon EOS 1Ds: 55 ms
Canon EOS 1V: 55 ms
Canon EOS 20D: 65 ms
