i agree. crappy advice. if you have some legitimate basis for getting special access ("my wife's family lives in town" or "i want to keep working with addicted teens and I cited your faculty's work in my article") then you should have said so in a program-specific essay when you applied. ERAS will let you upload as many program-specific essays as you want. Failing that, don't harass a PD on the day that a huge pile of new info in the deans' letters has to get dealt with. a call can go wrong in a lot more ways than it can go right.
nobody ever talks about how many phone calls they made that DIDN'T turn into interviews, so the anecdotal "i called and they gave me an interview" stories get blown way out of proportion.
in my view it's ok to THINK about calling after Oct 15, or after you're rejected and other applicants have had a chance to give up some offered interview spots. let the programs review the damn apps before you give them more to deal with, and have a non-trivial REASON to call.