Expressions or not, there is not a strong enough physical resemblance to T.R. Knight's features.  I do apologize, I overlooked the date on the photo, you had in fact provided that information.  However, the date of January 10 in and of itself is evidence enough that the individual in this photo is not T.R. Knight.  The entire cast of Grey's Anatomy, including T.R. Knight, was busy filming in JanuaryT.R. was most definitely not on a filming break.  Additionally, T.R. was in attendance at the People's Choice Awards on January 9, and many reputable agencies (Getty, WireImage) photographed him at that eventwith short hair.  It is impossible that the individual in your picture is T.R. Knightat least not the one this article is about.