Let's remove advocacy from the discussion for a moment and talk about the facts...
On the Palm Site...
http://www.palmos.com/platform/os5/palmvspocket.html
Software Compatibility. Their statements are mostly true. If you had a MIPS-based PPC and upgraded your unit by purchasing a PPC2002, then the software you had on your MIPS-based device wouldn't run. Palm "piles it on" with meaningless and non-applicable additional data, but for the most part, it is true.
Hardware Freedom of choice. Fluff and technobabble to confuse the reader.
Software developers. True.
Enterprise Standards. If true, so what?
Market Share. True...but the numbers are changing.
Expansion. This is funny... they make it sound like all of the Palm expansion choices are available on a single device. Pssst, don't forget that within the Palm product line itself, there is an incompatibility in the connector port.
Connectivity. For the most part this is true.
Battery Life. Unfortunately ABSOLUTELY TRUE.
Estimated Street Price. A little outdated, Audiovox Maestro is about $250 now (was $220).
The Palm definitely has its place, and in some areas, far surpass the PPC. If your PDA usage is focused primarily on the PIM, then Palm wins hands down... but if you want to do a wider variety of things like multitask, play MP3s, etc. etc. then the PocketPC is the winner.
But there is no single end-all-be-all PDA.