Hi, Mike:
I know from experience that diet alone "CAN" control AS, however, it requires a level of attention that is nearly impossible for most people.
And from my own experiences, I am sure that our technological diet contributes--in more than just one way--to our disease process. And convinced now that AS can be totally defeated by judicious employment of antibiotics in conjunction with strict diet. My own AP for AS has worked quite well, and something like this can help us achieve very lasting remission. And as You observe, it is not diet alone, but a more practical approach that has been very effective in my case.
HEALTH,
John