Despite your snotty reply, I suggest you read the whole article. The author obviously knows Perry and kinda likes him.
I watched the SHORT CLIPS and the the FULL SPEECH. Perry did a good job on the FULL SPEECH.
There is a OBAMA DRUNK speech on YouTube that is a regular speech but slowed down slightly (easy to do with video software) - sounds like a Drunk.
Be careful before you believe what you see and/or hear.