The latest U.S. numbers are in from comScore for the three-month average period ending January 2013 and, while there aren’t any changes in the ranking, the percentage points are just a tad different. Apple and Samsung are still in their comfortable leading positions in the OEM standings, both registering a slight growth, while HTC, still in third, is losing a bit of ground. Compared to October 2012, Apple has managed to strengthen its leading position by adding 3.5% to its figures for a total of 37.8%. Samsung is also on the rise only adding 1.9% this time for a total of 21.4%, ...