This is a Nielsen Video Scan for HD Discs tracking results thru March 18th as put together by Sony. So read with that in mind. However, alot of information here so be patient and click thru:
As much as I distrust ANYTHING Sony claims or reports, I doubt if even Sony would fudge Nielson's numbers; too easy to dispute.
I gotta admit those numbers were a little scary, until I realized a couple of things:
1- Sales reports are up through March 18.
2- Those are actual retail sales, and do not include any pre-orders, just sales of titles already released.
3- Sales figures don't include Wal-Mart. Everyone knows most HD DVD owners buy their disks at Wal-Mart.

Just kidding on #3.
Well, everyone should know that I'm one of the biggest HD DVD supporters here.

Jan. - March was the biggest drought of HD DVD buying for me; I just bought two during the whole first 3 months - The Departed & Babel. I rented Poseidon & Clerks II. HD DVD had a total of
23 releases Jan. 1 thru March 18. Blu-ray had
59 releases during the same period, with top selling titles of Crank, The Prestige, Casino Royal, and The Departed & Babel (also available in HD DVD). I'm surprised Blu-ray didn't lead 10 to 3 or higher during that period.
So, no, Sony didn't "fudge" the Nielson numbers, they just picked the best possible time period to highlight Blu-ray sales successes.
As I've said in several posts, with the heavy release schedule in late May for HD DVD and the new lower pricing on HD DVD players, the Nielson numbers reported in June will tell the story. Obviously, I'm hoping for improvement for HD DVD.
In the meantime, the chart below from eProductwars shows the sales rankings of the Top 100 Products on Amazon.com for the two formats, from March 9 through today. It shows a significant narrowing of the gap for HD DVD since early March. :up