^Also, the IMF and others will have all had to have changed predictions because, their predictions were made on the back of Cameron saying he would trigger article 50 immediately.
As this hasn't happened, and appears unlikely to happen until 2017 the economic predictions do need to be revised. You can't say "Remainers got it wrong" when the conditions they were predicting the conditions to arise in haven't happened yet.
The BoE survey only looks around 3 months ahead, where it does look ahead, and otherwise compares the last 3 months - 1 week out of 12 is therefore post the vote to leave - compared with the same 3 months of the previous year. It's hardly a strong indicator of post-Brexit sentiment. It also contrasts sharply with Deloitte's CFO Survey, dealing wholly with the outlook and conducted fully post-referendum, that showed a collapse in confidence among those holding the purse strings.^
So disaster was going to happen at the time of the vote, many threats about immediate disaster and emergency budget of £30bn of cuts and tax rises.
Nothing happens despite remain desire and random postings on many threads. Many people saying contingency plans in place immediately activated, certain job losses and reduced investments.
Then uncertainty is the key issue, no plan, nobody decided exactly what they want.
Now, although uncertainty increased for 6 months due to delay in Article 50, it will all blow up soon.
Despite markets settling down, despite markets settling down, companies doing a no change scenario - it will all fall apart in the future. Brexit optimism of the future is winning in reality over the remain pessimism.