In his Linn's Stamp News column Modern FDCs of Oct 22 Lloyd deVries reports that the most popular FDC offered by the USPS of the first nine months of 2012 is the dragon stamp that marked Chinese New Year.
One can guess that the reason for this may be the strong stamp market in China, which has had a major impact on the philatelic world, as prices for China -- and even some China related stamps -- have skyrocketed within the past year or so.
One example of the strength in the China philatelic market can be seen in their dragon new year stamps. They were issued in various configurations, including souvenir sheets, sheet of singles and booklet. Offerings of the booklets online show that those who bought them at face value have done very well, while those who bought them as soon as they hit the secondary market (at prices around $6.00 to $7.00) have seen the prices double within the past several months.