Is 3.0 accelerating the PSP?

Various users on the 1UP, IGN and QJ forums have reported increased performance of games running the new 3.0 firmware. Some games are reported to have faster load times, while others simply run a lot more smoothly and quickly. To a few users, Vice City Stories supposedly features a huge performance boost, with a much better framerate and less draw-in. Web browsing is supposedly faster as well (although memory errors are still common). Popular opinion seems to be that Sony has increased the clock speed of the PSP from its default 222MHz (note: The PSP can go up to 333MHz, but this was restricted due to battery drain issues). Others have suggested that the coding of the firmware is simply much more efficient.

While I've been running 3.0, I haven't noticed any significant difference in the games that I've played, meaning groupthink may be coming into play. Wouldn't Sony want to highlight or advertise such a potentially big performance increase? For users of 3.0, post a comment below, and tell the rest of us if you've experienced a speed boost in your gaming recently.