Yesterday I logged over 7,000 attempts to login to my WordPress sites. Luckily, they were mostly immediately blocked, added to my firewall. The list of 4,033 different attacking IP addresses can be found here. The attack started at 2:50 in the afternoon on Monday the 13th. Sunday I received only six attempts, so classifying this as an attack is definitely appropriate.
So far today (Tuesday the 14th) I have logged over 2,800 attempts to log into my sites via wp-login.php. And that number has increased by 25 in the time it’s taken me to type these few sentences.