I took my DAT a few weeks ago at the 42nd/43rd Street test center. I was sceduled for 5 PM but I got there at 4 just to make sure I found exactly where it was, and they started me at like 4 15. The test center was clean. A lot of people were taking exams at that time, and it was on the 10th floor. Because I took it later I was taking it during the middle of rush hour so you could hear street noise, but they provide you with ear plugs. Also, I think they turned the AC down b/c midway thorugh my test the center was hot. However, if you're used to studying in NYC the street noise isn't any different then usual. Also I asked them if you could touch the screen and they said you could. I don't know if any of this helps at all.
Best and GOOD LUCK