Switching in early 2010 would have made you an early adopter.
My sense is that most sites use Percona Server instead of MariaDB, because Percona and xtradb (mods to innodb) have been around longer, and those changes are generally a subset of the changes MariaDB incorporates.
http://kb.askmonty.org/en/mariadb-case-studies/ (including Limelight networks)
Switching in early 2010 would have made you an early adopter.
My sense is that most sites use Percona Server instead of MariaDB, because Percona and xtradb (mods to innodb) have been around longer, and those changes are generally a subset of the changes MariaDB incorporates.