The law of averages takes over at some point. Every new release has an initial rash of high marks from honeymooners - XM, Avengers, MET all were #1 for a week or two, then top 10 for another few. But that is usually on something around 50-70 ratings and 20-35 comments.
ACDC has climbed up through the ranks and is a legit top 6 machine now. There are more than 500 ratings on it now, and the averages are there to support its rank.
STLE/Prem is already above 150 total ratings and 60+ comments. That is a solid base to build on from here. Metallica is at 214 ratings. XM at 243. The odds say that STLE is not going to have a run of terrible ratings upcoming. It should be fairly consistent, or even better as code is honed. If STLE was sitting in the top 10 still, with 50 or 60 total ratings, I would expect a drop down high teens to mid twenties. But that kind of drop would now take a bunch of really bad reviews to come in, with no more great reviews.
I think it is safe to say it is going to be top 12, with a chance to climb like ACDC. Ritchie seems to be really hitting his stride with Stern.