", it hasn't been shown that they aren't (studies are still under way). "
Studies? all they have to do is count them every year and record.
"However there is in fact evidence that hurricanes, on average, are getting more intense."
No there isn't.
Did you miss this quote from NOAA in Marg's piece.
"But for now, according to the National Oceanic and Atmospheric Administration, "it is premature to conclude that human activities – and particularly greenhouse gas emissions that cause global warming – have already had a detectable impact on Atlantic hurricane or global tropical cyclone activity."