No Market Share movement for WordPress 3.7 yet sorry.
Get a list of 984,939 websites using WordPress 3.7 which includes location information, hosting data, contact details, 49,755 currently live websites
which includes 7,173 domains that redirect to sites in the list. 942,357 sites that used this technology previously and 19,965 websites in the United States currently using WordPress 3.7.
Distribution of locations of all WordPress 3.7 customers we've ever tracked.