Yup, have the same excerpt in my old -300/500 manuals, we had the same basicly for the NG but with the introduction of software based performance calculation it vanished.
As i said, if a lower thrust rating is available that could solve that problem if it exists nowadays in the first place. VMCg is very very low for the 737 NG and not too much of an issue in the classic, although it sometimes very rarely became one.
V1 is an adjustable value, in part VMCg is as well and of course Vr/V2 have a very broad band of possible values. That might not be part of the JAR training material, but it was actually partly expressed in our pre-JAR material issued by Lufthansa. Interesting is the boeing issued training material for narrow runway operation which adresses VMCg concerns, especially in the combination of narrow runway and crosswind.