Were holiday online sales THAT good?

E-commerce stocks are up sharply today on the comScore prediction that holiday online sales will grow 28% year over year. Earlier, comScore and others were predicting online sales growth of 22-25%. So the stocks are moving:

• Amazon up over 8%
• Bluefly up 11%
• Drugstore.com up 4%
• Ecost up 9%
• Overstock up 2%
• Shopping.com up 6%

Yahoo!, eBay and Blue Nile aren't participating in this rally. But I wonder whether three percentage points of upside to the aggregate growth number (28% from 25%) is enough to justify the moves in the pure-play e-commerce stocks. After all, 28% growth is still below last year's growth rate of 30%, and offline retailers like Wal-Mart are taking market share online.

Full disclosure: at the time of writing I'm long SHOP.