2 of 4 added 200 characters in body

Nope. This didn't work.

Makes sense, since I recall reading that deleted comments leave no trace (unlike posts). They disappear. So any record of you having commented disappears as well--then the @reply won't work.

Looks like comments do leave a diamond-visible trace, so I guess that they are stored in the database. But the SE people have already thought of this and made sure that @replies don't work.