Yeah, 40 was way too slow, I suppose it was okay because it still had some cool stuff but what was covered in ep40 should had taken 5-10 mins max. The animation was decent, I wish it was better but it wasn't bad or anything. 41 was borderline great though, even though it was kinda slow too (it covered two chapters though), the direction was very good and the filler scenes worked well. Plus miniature kyuubi was very well done, much better than I thought it would actually. Naruto owning Kabuto and the bridge falling apart rocked as well.
So yeah, 40 was okay and 41 was great. I hope 42 will cover three chapters but I have a feeling it will only cover two.