Key height and key dip

[Vanderhoofven]

Dear Friends,

Since the recent topic of discussion has been on keydip and after touch,
here is another question related to that topic.

Is there a preference for a sharp key height of 1/2" (American pianos) or
for 12 mm (Asian pianos)?
Is there a noticeable difference in the action if 1/2" is used instead of
12mm?  Will pianists notice the difference?  How will it affect keydip and
aftertouch?

Thanks!

David A. Vanderhoofven
Missouri Southern State College
Joplin, MO