From the HOTP thread at the top of the HDTV Programming forum page
Nielsen Notes (Cable)HBO’s ‘Girls’ Down In Season 2 Finale
By Dominic Patten,
Deadline.com - Mar. 18, 2013
The second-season finale of HBO’s Girls at 9 PM drew 632,000 viewers Sunday night, down from the 1 million who watched the show’s Season 1 finale June 17. It also was down from the 866,000 who tuned in for the Season 2 premiere January 13, the same night creator/star/executive producer Lena Dunham won a Golden Globe for Best Actress in a Comedy Series and Girls won Best TV Comedy. Over three airings of last night’s show — which was co-written by Dunham and executive producer Judd Apatow — at 9 PM, 10 PM and 11 PM, Girls drew 1.13 million viewers.
The series has been averaging a gross viewership of the 4.6 million this season. Besides watching the show on HBO and on DVR, 27% of them watched on HBO Go and HBO On Demand. That makes Girls the most-watched show on the additional platforms of any current HBO series. Girls‘ first season premiere on April 15, 2012 pulled in 872,000 viewers.
http://www.deadline.com/2013/03/girls-ratings-season-2-finale-hbo/