There is an obvious reason, that I'm surprised has not been mentioned, about why Palm did not announce the Pre 3's CDMA 4G tech: Simply because, It would indicate what carrier it is headed to.
At&t and T-mobile have different 3g bands. But use the same 4g tech. If you want to release the most info you can, with out indicating what carrier you are headed to, you can only reveal the tech that the companies have in common. In the GSM case... HSDPA+ and you can't reveal the 3g bands... why? cause AT&T and T-mo use different bands... so what did they release on Feb 9th?
HSDPA+, but no bands. Based on this info you can't tell if it's going to AT&T or T-mobile.
So why would you expect them to reveal the 4g CDMA tech? Verizon uses LTE and Sprint uses WIMAX. If they announce a WIMAX Pre 3 it's just like saying a Sprint Pre 3. They are not here to announce carriers yet, so they can't do that.
So, what do they reveal? The tech that Verizon and Sprint have in common: EVDO rev. A.
Once the Verizon and Sprint deals are finalized they will announce the LTE Pre 3 or Wimax Pre 3 respectively. Make sense? There is no logical reason to think the Pre 3 has not had CDMA 4G planned from day 1.