I'm not here to say which is better for reviewing settings, top or back, because that seems like personal preference - but this was a funny reality check for me, because I have been shooting with the K-1 for over a year and forgot it even had a top screen. I even Googled for images (don't have the camera with me) to double-check.
I guess I don't use it much then, which is weird, because with my previous Pentax K-3 and K200D I used it all the time. Maybe because I can tilt my screen up, and thus when using a tripod I just look at the screen? I'm not sure.
Thanks for giving myself a laugh.