Speeds of Pentax DC

[big_potato]

While the shutter lag & shot-to-shot time are acceptable, operation are user friendly and images are good, I found the speeds of Pentax DC (430RS & 750z) are always slower than the others:

1. Review zoom
2. Power-on
3. Response to user's button-press and menu selections.

Do you agree?

I heard some Casio DC also use Pentax firmware, but Casio is renowned for it's fast speed. How come?

I am not comparing with the fastest DigicII, but even with Kodak and older Nikon or Canon, I still feel Pentax are slow.

Are there problems with Pentax's GPU or their firmware?