How much technology are your kids exposed to and how young?
DH and I are both engineers, which means we live in a very technology friendly household. The amount of computer we have still exceeds the amount of people living in the home (1 desktop and 1 laptop for both DH and I vs. 3 family members). Our desktops also have dual monitors, and since DH trades the stock market, most of his day is spent on the computer. With that said, DS was exposed very young to our level of technology. By the time he was 1.5 years old, he could navigate our phones and we had games on them for him. At 2.5 he can pretty much pick up any phone or tablet and navigate it without much instruction. He has started playing Purple Place on my desktop and has very good control of the mouse and keyboard action. However, on the flip side, we severely limit TV time. He gets maybe an hour a day with the TV on at all, of which he watches maybe 15 minutes.
And of course, he traded his first stock at 3 months old...and made money doing it (obviously we know he had no idea what he was doing other than hitting keys that DH told him to).