I suspect there's another cognitive difference at work here too, where my wife says she doesn't bother remembering things unless she thinks they'll be useful later, while I tend to store all sorts of random events and facts and figure I'll just sort through them later. As a result all of her early memories have to be "cued" (specifically asked about, or recalled in relation to some other similar situation that came to mind), while I could tell you about the time I got dropped off at a babysitter's house age 9 months or the pony ride I had for my 3rd birthday or how I'd go with my dad to the Veryfine juice factory in Littleton MA to pick up cases of juice bottles for my lunch.