[Zope] Templates vs DTML

We've been using DTML but we are at a point where we could move to page templates. We are starting a major restruture and rewrite of much of the system and are debating moving to ZPT. Performance is potentially a major issue. We are using Zope 2.9.X, will eventually move to Zope 2.10.X and Five. Python 2.4.X. Has anyone done any benchmark comparison of the two design choices? For the same functionality, which performs better. No flame wars about which is better, just information about performance.