I know in baseball, there is a lot of research at what point statistics begin to stabilize. For example, a pitcher's strikeout percentage becomes meaningful a whole lot sooner than their ERA or batting average against (which is more random/variable than you'd expect). I don't know as much about basketball statistics. I'd say that Akok and Jackson have definitely improved their shooting, but I think we all expect those percentages to drop as the season progress.
I think 33% 3-point shooting from Andre Jackson would have been an optimistic, but not totally unreasonable, hope for this season. If that was your prior expectation, than he has made just three more shots than expected. Digging deeper, the chances of a 33% 3-point shooter making 10 or more shots out of 21 is about 12% (obviously we can't take into account shot difficulty, or at least I can't).
I would have expected Akok to make about 35% of his 3-point attempts this year. Let's say we assumed he would shoot 33%. The probability of making 12 or more out of 23 if he was a 33% 3-point shooter would be just over 4%.
What does it mean? I don't know! I expect them both to regress, but even in a small sample I think there is evidence both have legitimately improved their shooting this year. We would benefit from getting Akok a few more corner threes, if possible. They look real good from him. Hopefully any regression by these two will be balanced out by improved shooting from Polley, Hawkins, and hopefully Cole.