This isnt new but there's new people everyday.
I'd like to make people aware of the fundamental flaws in the millionaire "study" Dave so frequently cites. The first issue of creditability is the self-selection bias among the 10,000 participants. An overwhelming portion of the 10,000 people were Ramsey followers (people already in his ecosystem, listening to his show, using his Financial Peace University, etc.). This heavily skewed the results toward people who followed his exact advice. A creditable study includes a random or representative sample size. Dave's "study" wasn't neutral and it wasn't random, it was Dave's followers.
Dave loves to claim that most millionaires "paid off their house first". Again in a group heavily populated by Ramsey devotees, it’s not surprising that nearly all participants prioritized paying off the mortgage first. The reality is in the broader population of millionaires, many do carry low-rate mortgages while investing the difference (especially when mortgage rates are below expected market returns). Many wealthy people follow this method as cited by more creditable studies below.
Next it's not the largest or most authoritative overall study of millionaires. There have been larger and more rigorous studies by firms like UBS, Credit Suisse, or academic researchers that use broader sampling methods (e.g., from tax data, wealth databases, etc.).
Dave presents the results as universal proof of his system, but the methodology violates just about every core principle that makes a study useful. Dave’s “study” is about as credible as the Church of Scientology calling itself a religion. Its as honest as a North Korean election poll, as useful as a screen door on a submarine, and as flawed as mcdonalds funded diet study. It wasn't a study, it was a biased survey.