I have to disagree with you. Here in Brevard on the south end I have see dozens and dozens of wild juvenile Igs running lose. Not to say our most recent freezes didn't put a hurting on them.
And too often in the government... or for any organization they interpret the results to mean what they want it too. The expansion to New York by 2100 by my understanding was based on the 3 1/2 to 6 mile expansion a year rather than anything to do with climate or anything other science. I may have missed something in the article though.