This morning’s Tweet from Zillow’s CEO Spencer Rascoff caught my attention:

Zillow’s record January: 15.7 million unique monthly visitors, up 75% year-over-year. Thanks to each and everyone one of you!

This seems to be a clear indication that Zillow is growing fast (13 million unique users in December) and pulling away from the pack of real estate portals. Anyone know (and willing to share) February traffic numbers for Trulia and Realtor.com?

Full disclosure: I worked for Zillow for 4 1/2 years and am a minor shareholder in the company.