I said:
I think overall visitor numbers may have been down slightly - especially visitors to London from within the UK, vs overseas visitors - but IIRC the visitors London had spent quite a bit more overall.
From your link:
Overseas residents made three million visits to the UK in the month, down 5% from August 2011, according to the Office for National Statistics (ONS).
This may be due to fears of overcrowding due to the Games and the unseasonally wet weather.
But the amount spent by visitors, which includes their spending on Olympic tickets, was up 9% on August 2011.
So, exactly what I said....