Is The Doctor Now Immortal?

Since The Doctor first regenerated back in the 60's, it was known that he could only regenerate 12 times. But in the upcoming two-parter story, "Death Of The Doctor" in "The Sarah Jane Adventures", Matt Smith's 11th Doctor guest stars and is questioned how many times he can regenerate. The Doctor answers the question by saying that he has no limit. He also added by saying that the action just continues. So I guess the creators of the series have decided that The Doc has no limit.
Now that's fucking AWESOME! I fucking knew this would happen. I knew that it would turn out the The Doctors 13 lifes would'nt be the last.