Here's some more info:
HTC Incredible, 1GHz Snapdragon - Qualcomm QSD8650
HTC EVO, 1 GHz Snapdragon - Qualcomm QSD8650
HTC G2, 800 MHz, Qualcomm MSM7230
HTC Thunderbolt, 1 GHz Snapdragon - Qualcomm MSM8655
According to Qualcomm's site, the Incredible and EVO are 1st Gen Snapdragons. The G2 and Thunderbolt are 2nd Gen. However, there are 3rd gen dual CPUs listed. They have shipped, but I couldn't find anything on where they were headed. Those dual cores are available in 1.2 and 1.5 speeds.
The Bolt will have a second chipset from Qualcomm, the MDM9600, which by the articles I've found is a tri-mode LTE/HSPA/EV-DO Rev. B modem chip. This component is apparently the hold-up as to why the Bolt won't be available till later. I couldn't find any info on this chip on Qualcomm's site.
This past Wednesday is when Qualcomm officially announced the MSM8655 Snapdragon processor and the MDM9600 LTE modem chipset.
Qualcomm Announces 1.2GHz Processor and LTE Chip (Phone Scoop)
Qualcomm News and Events - Press Releases - Qualcomm’s Snapdragon Processor and LTE Modem Power Connectivity Devices on Verizon Wireless’ New 4G LTE Network
Cut from the Qualcomm presser:
Maybe the processor in the Bolt is an under-clocked 1.2 GHz.