Many businesses are seriously under-powered when it comes to home broadband. Our experience in the small business market is that many firms expect their staff to work from home and just assume that any cheap broadband connection is fine. Staff then have a poor experience working remotely on their office network and everyone is unhappy.
What these businesses forget is that working from home often means that a lot of data is going upstream from home to office. Staff are quite naturally expected to be productive. So the information they produce has to go from home to the office network - when a user saves a document for example.
This is the reverse of the way that ADSL broadband was designed, which was on the basis of much more information coming downstream from web sites (like a video) than going back upstream (like "next page please"). With ADSL it doesn't matter how fast the promised and much-hyped downstream performance is; almost every ADSL connection has a very dreary upload speed. Because of this it's vital to squeeze every bit of performance you can from your home ADSL line.
To get that performance you need high quality broadband. Cheap broadband means crowded broadband which means poor performance. You are in the queue with all your neighbours and every school student chatting to their friends online. The result for someone working from home is that they wait for an age while their computer tries to save a document. It is not a good use of expensive employee time.