As a qualified Chartered Accountant, an ex senior manager in one of the 'big 4' firms, I can tell you with absolute certainty that an audit is not worth the paper its written on. Infact, it was the first statement of the lecturer at uni in audit 101, many years ago.
It does not guarantee that the accounts are correct, it merely states that in their belief, with the limited information they have seen, they dont believe that there are any material errors in the accounts. 'material' varies from client to client, and is based on a risk assessment including the industry, job separation etc etc. It is a very loose concept.
There could quite easily be many falsifications within the QF/JQ framework.
The overall position of the company may be the same, if, as we suspect, cost allocation etc is questionable. It is just the segments (ie Q DOM, JQ, FF etc) that will change.