I use whatever I can get away with. I guess I'm not too serious about studying my gear as the jump from 14 mp on my K-7 to the 24 on the K-3 has never occurred to me as being an issue with sharpness, or lack thereof.
If my images aren't sharp, I usually chalk it up to a few things:
1) Too much coffee making my hands shaky as all get out
2) Poor posture/camera holding technique (IE, being lazy, out with other people and not concentrating, etc)
3) Subject is moving too fast for my chosen shutter speed
As soon as I fix those things, my images sharpen up. Of course, the only thing I can do about the coffee is wait
Also, purchasing a grip was the best thing I did for my handheld shots. I primarily shoot with the DA*50-135. Coupled with the K-3+DBG-5, I couldn't ask for better ergonomics.
I guess I'm simply not convinced that the number of pixels on the sensor has more to do with an image being inadequately sharp than technique and appropriate shutter speed for the subject.