I empathise with the writer although I do think there are some lessons to be learnt on both sides here. Here are some tips for all couchsurfers to keep in mind.
2. Select your host wisely. If you're on a short city break, where your host can make or break your whole experience, it pays to do a bit more research than you would if you were on a schedule-free round-the-world trip, where you can change plans and move on the next day if necessary. Exchange a few emails with your host in advance to build up an idea of the sort of reception you might get on arrival.
3. I imagine the Irish Times writer would have been a lot more tolerant if his hosts hadn't been so frosty, however, you can't complain if a New York City apartment is cramped. It probably feels the same for your hosts too, and yet they've agreed to share it with you.
4. If it's that bad, move on. Granted, that's not so easy in New York, where hotel rooms and couches are in high demand. However, if it's got to the point where you are "escaping" your hosts and dread even thinking about them, then spending a few minutes to send a couple of mails to some alternative hosts is surely worth a try. The hugely active NYC forum has a sub-group for last-min couch requests.