Here, the s3 quote is superimposed over s1 and s2 screen caps; warning, probable feels! Order is Scandal, Study, Baskerville, Study.
I think it's really cool that Team Sherlock likes to send out Tweets, comments, pics -- you name it -- to tease fandom. Okay, maybe it's just that I enjoy the entertainment factor. 8) Because I'm a twisted person, eh?
"@SteveLawes: @arwelwjones relaxing on set #sherlock pic.twitter.com/RNi7H3dIMJ" Blast from the recent past!
— Arwel Wyn Jones (@arwelwjones) September 7, 2013
Final Problem also notes that although Ben WANTS the States to get Sherlock simultaneously as the UK, it is not within his power. See the May 2012 (!) Masterpiece video itself. It's 47 minutes long, so settle in with a beverage and some snacks.