AVVO seems to be fairly popular.   I used Alexa.com  to verify web traffic see below
You may want to use Alexa to check the traffic status for your firms’ website(s).

How popular is lawyers.com?

 

Alexa Traffic Ranks

How is this site ranked relative to other sites?

 

Global Rank

12,448

Rank in United States

2,610

How popular is avvo.com?

 

Alexa Traffic Ranks

How is this site ranked relative to other sites?

 

Global Rank

5,326

Rank in United States

1,058