I have a similar experience to Roffles. At work, wifi performance is solid, but at home (with a few walls), performance is fair to poor. My guess is that the poor performance is due to interference from devices in neighboring houses also using 2.4GHz. I've had no problems with my Galaxy S3 at home (and my wife's Apple devices work perfectly), but the N7 2013 gives me headaches.
When I'm having connection problems at home, if I turn off wifi and turn it back on, then I get data flow again immediately. But after one or two web page views, the problem returns. This is usually in the morning as opposed to other times; I don't know why.