If you want something to be clear you need to take time to re-read and revise it. If you really want to be sure there needs to be a full day between writing and revision (otherwise you will read what you meant to write, not what you actually wrote). For a presumably non-native speaker I expect he needed that extra effort.

Technically I should wait a day to hey the reply button here. I don't see anything wrong with this post now, but it is a reasonable bet that there is something that someone else sees.