A new survey of 4000 North American consumers has led ChangeWave Research to conclude that Apple and Samsung are seeing “explosive momentum.”

Of those planning to purchase a new smartphone in the next 90 days, 54 percent said they would choose an iPhone. A total of 13 percent said they would choose a Samsung. That’s down 11 points for Apple and up 8 points for Samsung.

ChangeWave said Apple has not dominated the intent to buy this long after releasing a new product.

RIM came in at 2 percent, HTC 3 percent and Motorola 7 percent.