Yes. A thousand times, yes.
Dare I say it, there are people in this thread who are kidding themselves that their shoes fit.
Proper creasing isn't part of fit determination as creasing don't really set in after several wears. Same with bowing on sides. Actually, the gap in lacing is the least important part of proper fit; lacing gap does not hurt your ability to walk but just look unsightly. However, lacing without any gap is much more problematic to walk and requires some padding to fill the space.
It's experience, preferences, and touching the right places. Maybe I will find time to repost old AA thread from '08 and/or taking some fit determining methodology pictures from Men's Ex/Last.
Some people prefer a very tight fit, like a foot straitjacket/corset. And some prefer normal or a loose fit. So the individual feedback is part of the process. And of course, there will always be some who buy shoes due to the brand and the look on the display rack, not due to good fit.
Whoever claim a pair of RTW shoes fits like a glove is just lying to themselves unless they have identical left and right foot shape/measurements. But who does?
Mud? How clean are the welts?