Pages must download as rapidly as possible.
It isn’t possible to prescribe specific response times across the site.
As a generalisation no page should take more than 30 seconds to load on average broadband, but it wouldn’t be OK for a whole series of pages in an application to take 30 seconds.
A user’s tolerance for page load times also varies depending on their familiarity with a site, with their motivation, and with where they are in a process. There will be more tolerance (if not satisfaction) with longer page loads towards the end of a process where the user has already invested time, than if the long page load is at the start of the process.
There is a need to reduce page load times for areas of the site that are likely to be more heavily used by people on slow connections – such as login, MMB and OLCI, which may be used by people away from home / office when travelling.