With the credit issues there are today, just seems that some are going back to tried and true methods. Nothing wrong with that. As a matter of fact, I am getting ready to do the same thing since it is a buyers market right now. It would be interesting to know how long the properties that CDIV acquired were on the market. If it was for more that 6 Monks, oops months, then there is a good possibility that the sellers adjusted ARM rate kicked in.
ARMS were originally for contractors. They could build/remodel and just pay the interest till the job was done and paid off. Unfortunately, the "banks" saw it as a way to turn a fast buck, hence the position the country is in regarding the "credit crisis".