The number of mobile app downloads to iPod Touches overtook the number to iPhones on Christmas Day 2009

"Flurry evaluated download growth driven by Christmas across the leading Apple and Android devices, as well as their respective app stores, pulling a sample that represents approximately 10% of all download volume in the App Store and Android Market.
[...]
App downloads on iPod Touch soared past iPhone for the first time, eclipsing iPhone downloads by 172%.
iPod Touch 3G downloads increased by more than 900% on Christmas Day, compared to the average of all previous Fridays in December.
Total iPod Touch downloads (all generations) jumped by over 1000% on Christmas Day, indicating that in addition to new iPod Touch 3Gs coming into the market, iTunes gift card giving may have driven downloads to older generation iPod Touch devices."
Source: Flurry blog, 28th December 2009