I have seen A LOT of people around me with Android phones. A nice amount of people i work with and some friends have switched to Android in the last few months. I have another friend from work that ordered the N4 with me so we are both waiting for it.
According to Wikipedia in "Mobile Operating System" in Q3 of 2012 the total number of smartphones sold is 169,179 of those:
RIM - 8,947 (5.28%)
Symbian - 4,405 (2.6%)
iOS - 23,550 (13.92%)
Android - 122,480 (72.395)
Bada - 5,055 (2.98%)
Windows Phone - 4,058 (1.8%)
Other - 684 (0.4%)
Those are big numbers.