How many entry methods can google tell apart?
--typing the name directly into the address bar
--pasting the name in from some other source
--any of the above, if coming from an ISP that doesn't send referrers
--search via some other search engine
--google search for actual sitename
--google search for exact business name
--generic google search
If you don't enter via google, do they even know (or care) that you exist?