This was in the e-mail from Nielsen:
More U.S. homes have prepared themselves for the Digital TV transition according to an update from The Nielsen Company. As of March 15, only 3.6 percent of all TV homes remain unready for the June transition to all-digital broadcasting compared to slightly less than 4% at the start of the month. Homes where the head of household is 35 or under showed the most notable demographic improvement, improving from 7.2% unready to 6.5%. This leaves roughly 4.1 million homes unprepared, an improvement of nearly 350,000 in the last two weeks.
The percentage is dropping, but the number of homes is still sizable. And people in every one of them will be calling to complain the day after the transition takes place.