This article is from the FAQ, by with numerous contributions by others.
Is this somehow related to the
'fast track' approval of some LC applications by the DOL?
No advantage as of today for the whole world except, people born in
India, Mexico and Philippines, because EB 3 and EB 2 are both current
for the whole world, except the named countries. For professionals
from India, Mexico and Philippines it is much better to be in EB 2.