400
Over 40,000 admin portal accounts use 'admin' as a password
(www.bleepingcomputer.com)
This is a most excellent place for technology news and articles.
I find their statements a bit on the sweeping side.
That's just over 2 percent. "Widely accepted" in my book is a much larger percentage..
I guess its in comparison to other common passwords
2% is plenty enough to get a lot of orgs malwared. What gets me is the number of orgs that just have administrative systems internet-facing. That's the first fail