Also worth pointing out at this point that the AI indexes haven't actually dropped on average during Moffat's run.
No, they haven't. I'm nit using this as a crutch to shit on Moffat as I think he's doing a great job and that he and Davies are equally flawed geniuses in different ways, but this is what I mean - a quick jaunt to wikipedia:
Appreciation Index all-time-highs:
The Stolen Earth (91) / Journey's End (91)
The Parting of the Ways (89)
Doomsday (89)
Silence in the Library (89) / Forest of the Dead (89)
The End of Time 2 (89)
The Eleventh Hour (89)
Arse-end:
The End of the World (79) / Love & Monsters (76)
Anything above 80 is considered 'excellent' by the BBC. Only two episodes of new Who have failed to get 80. Every story from series 3 through to series 6 scored 85 or more except Victory of the Daleks and the Smith xmas specials, which in fairness have a higher audience, so the show is impressively consistent by anybody's standards, really. Series 7 had a few sub-85s, though - Rings, Cold War and Nightmare in Silver - a first for Moffat's run.
It's worth noting that the higher an audience a show gets the more difficult it is to get a high score - shitty daytime TV shows that get 300,000 viewers regularly score in the 90s, because that very targeted, niche audience loves those shows in a very specific way. That diminishes the achievement of some (Library/Forest were only watched by 6m or so) but makes others like Journey's end and The End of Time (10m each) even more impressive, in a sense.
It's clear, anyway, that the show is very consistently in that 85-88 range after Series 3 (1 ranged between 81 and 85 generally, 2 between 83 and 88) but Smith's era has struggled to reach those 'talk of the town' high 80s/early 90s scores that made Who in Tennant's run very socially piercing. It was, for a while, one of those shows that almost everyone was watching AND talking about; my mom, my gran, etc.
These same episodes are the top performers in ratings also:
1) Voyage of the Damned (13.3m / 86)
2) The Next Doctor (13.10m / 86)
3) The End of Time 2 (12.27 / 89)
4) A Christmas Carol (12.11 / 83)
5) The End of Time 1 (12.07 / 87)
6) The Doctor, the Widow and the Wardrobe (10.77 / 84)
7) Journey's End (10.57m / 91)
8) The Waters of Mars (10.32 / 88)
9) The Eleventh Hour (10.08m / 86)
That's everything above 10m. Of course, this begins to make an argument of the episodes that are for big dumb masses (excluding Christmas ones) doing the best, for obvious reasons, but... yes. What I'm saying, I suppose, is that those 'big dumb masses' episodes and 'event episodes' are the ones that gather the tabloid/mass public interest and speculation, which in turn can be used as ammunition to secure the show more money and time. Smith has (for better, for worse) had less of these event episodes, and so gathers less traction in The Sun, the Mirror, the Mail etc etc, which in turn puts the show in a slightly weaker position for negotiating stuff like extra air time and episode length, even if the average quality is actually higher/more consistent/better. Off the back of Journey's End, it's no surprise they were able to negotiate the second part of The End of Time up to 90 minutes, for instance.
I'll be bummed out if the 50th doesn't at least hit Waters of Mars numbers! Not that it matters in the end, I suppose. But I want the show to be as front and centre as possible as a fan.
I find all this stuff incredibly interesting! Terrible nerd.