This isn't true. Likely just coincidental from the sample size you looked at.
I do hope you're right. At least it would bring back some magic to my ASG. I do admit it's a small sample size (just 2 seasons of me correctly predicting the 3 point contest winner), so I might just be lucky. That sad, I'm wondering if I should actually go data collecting during the next ASG, or shall I just continue to enjoy the game since you said it isn't true (tho it's hard to be convinced without any proof).