Had the rear pads as good as shot after only about 5k miles. Decided to check them out thinking they'll be fine and totally shocked to see almost nil pad left. Fronts had plenty but replaced both in the end.
I had the same feeling about the first set bedding in the roters and while this happens it uses up the pad quicker. This is exactly what happened on my mountian bike (with disc brakes), initially done in a set of pads over one weekend in the Forest of Dean, the set I replaced them with lasted 3 or 4 times longer.
While I replaced them I slightly lowerd the rear brake pedel just to make sure I wasn't loading it while riding.
New pads have been in for about 1K, can't see too much wear yet but It's worth keeping an eye on them.... I guess just like the pre-ride checks say...
L