Apologies if this is not the right place for this question.
We have an Ajax web app.
At a user's site, they were having trouble running this application. It appeared that the internet was slow as they also had problems with normal browsing. Their PC was wired to the router.
I connected my laptop wirelessly to the same router and everything worked fine, which pointed to a problem with their computer.
Apparently not, they replaced the router and the problem was gone. Does anyone know how this is possible?