is it true that all, or greater than 1% of, emails and hashes were dumped?
I find it hard to believe you migrated 99% of passwords to a new scheme. I've never seen over 60%, and that is with a lot of prompting to users (and as as Scribd user i've never been prompted)
The migration can be transparent, since the app has your plaintext password when you log in.
Alternatively, stored passwords can be upgraded by using the new scheme on the hold ashed password, and storing that that's how the password should be checked in the future.
Since not everyone was migrated, I'm assuming they went the first way.
is it true that all, or greater than 1% of, emails and hashes were dumped?
I find it hard to believe you migrated 99% of passwords to a new scheme. I've never seen over 60%, and that is with a lot of prompting to users (and as as Scribd user i've never been prompted)