12-24-2016 08:55 AM
I've never seen it but there has been some discussion about it on the K3 and K3-ii on pentaxfrums.com.
It seems also that some people see it, some do not. I have the K3 and K3-ii and have never experience any noticeable delay.
I take photos of fast moving/skittish dogs all the time for the local animal shelter. Any delay woud be essentially disastrous for obtaining any useful images and create a heart condition for me. :-)
Sadly, the forums seem to degenerate as they usualy do and go off the rails. I haven't followed all the threads (the issue has come up there a few times) to see if a real solution or if sending for repair helps.
If you have not yet ugraded your firmware, that seems to help some people.