Does This Help Increase My Credit Scores?

I see more and more clients adding utility accounts to their credit reports to help improve their credit scores. But I just learned that adding utility accounts will only help a consumer raise their consumer credit scores for car loans, credit cards, student loans, etc as those lenders use newer FICO score models. Adding utility accounts does NOT help their FICO score with a mortgage lender as the older FICO score models we have to use will not rate these accounts.