i think you've misunderstood what i said.
some people just get sore even on great programs.
but more importantly, doing the same exercise often is what cuts it. Westside style ME lower day is once a week. Westside style alternates exercises often. this is often not an adequate style of training if DOMS is unwanted.
i lift very often. i experience DOMS only when i do a new movement. by 'new movement' i mean: an exercise that i haven't done for a while. a general rule of thumb is that more than 5 days is a while. tension and volume of tension must be factored in as well.
do the same movement with high enough tension/volume often enough and you'll most likely experience a decrease or elimination of DOMS.
P.S. keep in mind that when discussing Westside style, drugs should also be considered. drugs change everything.