For a site this new, I think the rate of theme submissions is great. As for activity on the forums, I don’t know how activity has been around here during the beta (unfortunately, I never recieved an invite).
I just discovered that ThemeForest actually had a forum, so maybe it’s just a matter of making it more visible.
- Author has had an Item Featured
- Author was Featured
- Bought between 10 and 49 items
- Exclusive Author
- Has been a member for 6-7 years
- Interviewed on the Envato Notes blog
- Microlancer Beta Tester
- Referred between 200 and 499 users
I guess uk has a very large number of web designers than usa as I have found more uk web designers on TF than usa