Yeah, some of the highs in the 5s for X/Y are better, but I don't think it got below 3, like X/Y now. The only weeks Adventures in Unova weren't in the top 10 was like when everything was 4+. Like I said, I don't know what it was at when it wasn't in the charts and I didn't check every single week, but it was generally in the 3s/4s. The last few months were mostly 4s. Overall it seemed to average much better (it was basically doing current Yokai Watch numbers).
We can then see the effect with much lower BOs (the first time a new gen movie did worse than the last movie of the previous gen).
Though Best Wishes was kind of an outlier, in that, overall it did pretty well. I remember it got super high ratings early on, I think higher than Diamond/Pearl's best (not sure on this), and the first movies did well, but Genesect fell off.
The highest Diamond/Pearl movie was also Zoroark, which is also really unusual.
I think everyone just wanted some Unova early on and for a while, but people aren't really feeling X/Y, and it'll have to keep chugging for 2 more years.