Probably best to wait until actual NPD results to say anything. After all, PS4 has been the top selling console 4 months in a row now (and would be 5 if it's on top for June). Wouldn't be surprised if the Switch gets a month after that.
While this indicator is really helpful, when there is only one SKU on Gamestop and 2 on Bestbuy (as opposed to the 3-4 it had in months prior) we don't really know what means overall.