scotbill,
What I actually said was this;
Must just be low-cost drivers thinking about their bonus.
Note the smiley on the end, if you're going to quote me, please do so properly and ideally in context. That comment was meant to be a little tongue-in-cheek, hence the "wink".
In my particular instance, as we'd passed the last opportunity to pull-off and let the B737 by, we did speed up as much as we safely could. It didn't really bother me too much at the time, although I did think their attitude was bad. They could have politely asked if the light aircraft ahead could speed up if it was causing them a problem, but no, we got some arsey complaining. We did use it as a learning point for the student, not to be pressured into doing things they're not comfortable with due to ability and/or experience, I only mentioned it now as it's relevant to the OPs situation.