Precisely ... since there is a long preadjud backlog ... there shouldn't be huge surprises and haphazzard approvals this year once peoples PDs become current.
Which is why .... if August doesn't move to Jan 2008 then Sep brings less hope because DoS / USCIS lose fine control over precisely where they need to move the date and Sep movement could be jerky.
To avoid such jerky movement ... the dates must move in August.