It's not coincidence. Bitcoin Core is the main client people were waiting for in order to utilize Segwit, and that was the case for me as well to a certain extent. I am in the process of creating new backups, paper wallets, etc, all Segwit. I think before the end of this week, I am completely moved away from the legacy addresses, which feels great.

Another sign of Segwit being utilized is when you look at the addresses showing up here second after second; https://blockchain.info/unconfirmed-transactions

I am sure that within two months from now, Segwit transactions will have taken over to such an extent, that legacy transactions will become the minority.