But that doesn't mean your site wouldn't receive referrals from google.com . Maybe 20%+ of your previous google traffic was originated from google.com. And its that portion which you might have lost because of drop of your site position to #149 - #150 on the serps of google.com .
I didn't drop in Google.com, I don't remember ever saying I did. I said I went up in Google.co.uk and traffic dropped. Position #150 is a slight increase anyway of about five places on the dotcom.