> Does this affect gameplay so much that the slower Casio is better for games
> simply because it has better controls?

Casio has better controls and by far better screen for usage indoors. iPAQ's screen is better when compared outdoors. As if it affects gameplay a lot, that's only for you to decide. For some people (like me) bad control is a nightmare, while some others don't have problems pressing the screen instead of buttons

> It also seems like games come out first on the iPAQ. Why?
A lot more people have it. It's fancier looking device and that's what sells everything, no?


> Is there anything that can be done in software to fix the control problem
> besides using touch screen buttons?

No. Many have tried.