Provided that your ultimate goal is ripe peppers, and that your season is long enough, that's not bad advice. Pinching off the first blossoms for several weeks, or pruning the tip to promote branching, will have similar effects. All of those techniques allow the plant to get larger before setting its full load of peppers, but push back the DTM for ripe peppers by several weeks.
In a short-season area (such as mine) anything which lengthens the DTM would be risky. I've pinched off the first blossoms some years (if the transplants began flowering before I was able to cage them) and
usually get away with it... but if the frost comes early, it means a larger crop - but only of
green peppers.
