Well since a DT episode once dropped to 5.5 million then I guess they must of been pissed about the 10th Doctor then

. Weather patterns affect saturday night TV in the spring and early summer.
The AI index created so BBC can keep an eye out on reception since its not just ratings that bother BBC since they don't get money from ad revenue shows Doctor Who is much loved.
Yeah, and the AI for Time of Angels was the highest yet for the season, and it's only a point or two higher than Victory.
The Doctor Who News Page report on the final ratings adds a note of perspective: although it's the first non-top-10 episode since Silence in the Library there have been huge increases in iPlayer viewership since then.
http://gallifreynewsbase.blogspot.com/2010/04/victory-of-daleks-final-ratings.html
Indeed, whether it's UK we're talking about, or North America, the nature of TV viewing has changed so rapidly in the last 2 years there's no point making any sort of comparison. Pretty soon in the US a show may be considered a hit with a couple million viewers on a standard network (as, indeed, DW is considered a hit on BBC America with just over a million). The days of 30-40 million viewers for a show aren't completely gone, but they're pretty much confined to one-off "experience" style special events such as the Super Bowl. I bet the 7.82 million Victory scored would have been the equivalent of 9 million back in the old days of Donna Noble...
As I've said elsewhere I'll only become concerned if one of two things happen:
1. An utter collapse in viewership sending the ratings down to 2-3 million in the UK
2. The BBC turning around and saying "never mind, we're not going ahead with Series 6/fnargle after all"
The question does have to be raised, though, as to why the BBC insists on showing DW at such an early hour, when past broadcasts even a half-hour later had notably higher ratings. Even if the BBC insists that its main target market is kids, I don't know many kids over the age of four who go to bed at 7 PM on a Saturday anymore...
Alex