It also depends on what type of loan you are getting. If it is a peso loan, then it is quite expensive. If it is a dollars loan the last time I was there about 6 months ago, the rate was 8.75. If you are a citizen of the DR and your income is not DOLLARS derived, you will get quoted a pesos loan.
However also understand that ScotiaBank does not lend in many places, so it is not a catch all. For example, in the Bavaro area they do not lend on most properties unless there is title. So for many people trying to buy under construction, there was only a couple of places in cap cana and roko ki that they would lend on.
So, yes, there is likely still rates under 10%, but you need to qualify for it.