It doesn't seem like anyone on that thread responded to the argument you posted from the site.

I think the statements in Scripture that hold prayer as being able to move mountains, etc. need to be reckoned with to effectively answer the gist of the argument. Otherwise we aren't taking the whole of the Bible into account to respond. I'm not saying that the author of such a website is presuppositionally ready to deal with the whole Bible, just that we should try to respond in a way that shows we take the whole counsel of God seriously.

Thoughts?

__________________
Joel Batts
Christ Presbyterian Church (PCA) - Memphis, TN

"Why wasn't God watching? Why wasn't God listening? Why wasn't God there for Georgia Lee?"
- Tom Waits
But you, O God, do see trouble and grief;you consider it to take it in hand. The victim commits himself to you; you are the helper of the fatherless. - Psalm 10:14