This morning, Gizmodo wrote about a stat that Europe's HD-DVD title sales had spiked and surpassed Blu-ray sales. That's wrong. That writer actually used US data, so they updated their post. But what about that US spike? It didn't have anything to do, actually, with the fact that HD-DVD has over 100k non-Xbox players in the field. That would have revealed itself with a more gradual climb in the charts.
Apparently, the spike occurs the same day that HD-DVD fanboys at AVSForum, the AV enthusiast site, had organized an mass buy of HD-DVD titles. For an immature format, even a few individuals can make a difference, if only on a day.