Went to the dealer today. Apparently this rapid cycling of the compressor is now normal as a gas savings measure when sitting at idle. According to the service manager it is the same on frontys and maximas (at least) as he has a maxima. He thought it was weird and we both speculated about duty cycles and how all the on/off cycles are going to affect the life of the system. Just to be sure, he did have my system drained and repressurized but it still acts the same. Not sure when this change went into effect but we probably need to watch for premature ac failures now.