It would be noteworthy if any evangelist for any programming language that is not PHP said something like this.
DHH pointing this out reminds us that even someone super devoted/entrenched in the RoR world can see the utility of it for this kind of use case, and that the rest of us should as well.
Unfortunatley, the ease of getting PHP scripts up and running leads to the bulk of its poor implementation. Is the lesson to make setup just difficult enough to scare of the novices?
Remember, everyone was a novice once. Lowering the constraints to get started can only mean that more great things will be created, not less.
Thank god it is now defunct so I can't embarrass myself by linking to it.
PHP works fine for many people and, hey, if it works for you by all means stick with it. We should all work with the tools we're most comfortable with.