Toronto loose a lot of Facebook users ?

Last summer Toronto was the capital of Facebook, but was outpaced by London, Uk in fall. Now it seem toronto is way out with 500,000 defections in the last month ?!?

Town / Country	02/3/2008	01/4/2008	Diff. in %
Toronto, Ca	1 828 940	1 251 720	-31,56%
Montreal, Ca	844 780	954 920	13,04%
London, UK	2 233 100	2 365 800	5,94%