  Motivated by some recent criticisms to our alternative Langevin equation for
driven lattice gases (DLG) under an infinitely large driving field, we revisit
the derivation of such an equation, and test its validity. As a result, an
additional term, coming from a careful consideration of entropic contributions,
is added to the equation. This term heals all the recently reported generic
infrared singularities.
  The emerging equation is then identical to that describing randomly driven
diffusive systems. This fact confirms our claim that the infinite driving limit
is singular, and that the main relevant ingredient determining the critical
behavior of the DLG in this limit is the anisotropy and not the presence of a
current. Different aspects of our picture are discussed, and it is concluded
that it constitutes a very plausible scenario to rationalize the critical
behavior of the DLG and variants of it.
