analytic reporting

I just dont see how to get metrics on my GA end of things. i am not seeing any data based on subdomains. we have a subdomain mapping and we are using host headers to display urls as blog.xxx.com.

right now im seeing the traffic of one visitor (me) and thats it.

my end goal is to see what blogs are performing well and what blogs are dead weight on my multisite. what does this plugin actually do than provide a graceful little box to put a UA code into?

we have 264 sites - i included some blog names and also included the screenshot of my settings. is it possible to view stats on the performance of any of the sites in my multisite?