My experience with Chase living in WI:

Freedom Card - 3 yrs ago (EQ only)
Continental card - 2 yrs ago (both EQ and EX)
United Select - 1 yr ago (pulled both EQ and EX)
Sapphire Preferred - 6 mos ago (EQ only)
Priority Club - 1 mo ago - approved instantly (EQ only)

I would agree with the theory that the second pull is when it goes to a manual review. I do remember the Continental and United cards taking longer to get approved. I had to call reconsideration to get the Continental card approved.