London vs New York, Which City has the Worst Twitter Manners?

Well,  just for fun the other day I was looking at the top Twitterers by City and Country and at first glance noticed that there seemed to be a bit of a difference between Followers and  Following (in Twitter terms) between “New York” and “London” as expressed in ratios. It struck me that it seemed to be significant, so rather than guessing, I got out the trusty calculator and did the numbers,  and as we know in the Twitter world that its good practice (manners) that if you are followed you follow back, and the ideal ratio is 1 to 1 with a bad number being anything approaching zero.

So which City doesn’t follow back and the numbers are surprising with the top 25 for London and New York  being used for the calculations  (figures obtained from Twitterholic) 

                    London                                                                                                                  New York

Followers               Following                                                                           Followers                     Following

 1,749,398                    133,582                                                                               647,915                               147,089

                                                                                                                                                                                                                                                                                                                                                                                                                                          So the ratio for “following to followers” has London only following back 76 to every 1000 followers (o.o76), with New York following back 227 to every 1000 followers (0.227)

So in summary “Londons” manners in twitter terms are 3 times worse than “New York”  (it follows back 3 times less than New York)

Has the mother country lost its manners and why?