For conventional, code based seismic design in the US, I don't believe that there are serviceability drift checks. You simply have to adhere to the rather liberal (~h/40) drift limits specified in ASCE 7 for strength level design.
Different drift limits apply if you're doing extra-code design such as performance based design but that, then, is another kettle of fish and much is left to the discretion of the design team.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.