I was thinking about this this morning on my way in, b/c of joejack's thread about reading right turners.
I kept track of my intersection crossings this morning and there were only two where I had to actually try to read or otherwise "negotiate" with motorists. I was in traffic- that is, there was a moving motor vehicle within ten yards of me- for the entire ride, with the exception of the MUP on the Brooklyn Bridge, which does not have any intersections, either. I've gone back and using google maps counted the intersection... I crossed 91 (or 93, depending on how you count some of the complicated ones in brooklyn). My math is not the greatest but that's a shade over 2% of the intersections I crossed that required anything more than cursory glances and an average degree of awareness. This was an about-average commute in term of traffic and my speed, which was (an average of ) ~16mph. (8.1 miles in 31 minutes, by my stopwatch.)
I know there's a temptation to claim NY exceptionlism about this but I'd be interested to hear how many intersections you guys feel like you have to negotiate or otherwise actively manage on any given ride. I was surprised at how little effort I spent doing so. My trickiest and most demanding negotiation in traffic today was a 3.5-lane, left to right merge from the left-side situated striped bike lane on Hudson to the extreme right traffic lane, and even that wasn't so bad (habitually traffic is dense and slow moving so it's easy to carve out space for yourself, provided the cabdrivers aren't feeling frisky.