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So - as the charts say - no statistical difference?

Isn't this link am argument against the point you are making?

The chart doesn't cover the 4.6 release which was in the end of December/early January time frame. So, it's hard to tell from existing data.

That isn't true. The whole point it to quickly pick up statistically significant variations quickly, and with the volume of tests they are doing there is plenty of data.

If you turn on the 95% CI bands you can see there is plenty of statistical significance.

Unless you and I are looking at different web pages… it only goes back to February, not December or January.

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