OldMeg
I remember us all being advised to peel carrots for the reasons you give. It was probably about the time of the research you mention (mid/late 90s), though I can't be sure, as you know how time flies. However, the topic was raised on a gardening forum in the last couple of years, and a very respected forum member said that this was no longer a problem, that the chemicals in question were no longer used, or something along those lines. I have no idea whether that was true or not, but at the time, I chose to believe it.
That said, my carrots are home-grown and chemical free, so a quick scrub is all they get.