That's so true, Rick.
Terri, drift diving in Cozumel (or Belize, etc.) is some of the EASIEST diving you can do. You don't go against the current, you just let it take you - slowly most of the time. You hardly have to kick, if at all, and your air consumption should be really good, because it's effortless.
The boat doesn't anchor anywhere, it just drifts along, following the divers.
Sometimes the currents in Coz are very SLOOOW, some are faster. Usually, when new people are on a boat, they'll go somewhere shallower and with a mild current, to let you get accustomed, so don't worry. Later in the week they'll usually take you to more challenging spots. Even then, you usually have to ask for the places that are known to have wicked currents - they're not usually standard fare.
If you have an advanced book, you might find it helpful to read the chapter on drift diving before you go. It gives helpful advice like descending as quickly as possible in a fast current because the current is faster at the surface then at depth. Also that the current is faster away from the reef or a structure, so to stay closer where it's calmer, and so on.
Drift diving is a lot of fun - don't worry! After your trip, you'll be spoiled about having to kick...
