We could also say 1M and still be a valid statement. I don’t know if that tells anything though.
Perception does matter a lot, and that’s why I used the 1% figure. It means one percent of WhatsApp users are investigating a competitor (not even deleting their account in WhatsApp, but I guess few did) and here people seem to see it as a clear tipping point to which I disagree - raw numbers don’t mean much if you have nothing to compare with.