Yes, a historic milestone took place over the past week. According to StatCounter, for one day, March 18, Chrome had 32.71 percent of traffic to IE's 32.5 percent. The lead was in no way huge, but it was there and that is a major event. Some curious graphs regarding the stats leading up to this have been released. Take a look below:
As you can see by the above graph, every weekend there was a significant drop in the usage of Internet Explorer and an equally significant increase in the usage of Chrome. What this shows then, is that many people are forced to use Internet Explorer at work who really don't want to. Because of this, Internet Explorer and Chrome appear to be in a dead heat when the playing field is leveled, such as on the weekends when few are working.