Man... you must have a lot of time on your hands
I, seriously, have never thought about this and if I did I would think - so what - as long as I can keep the liquid flowing, it shouldn't matter. What is driving this observation?
The extent of my concern about watering is how long can I get between waterings? My drive for S/H and for Orchidarium is solely based on this issue. Cacti were great for me except they were prone to bugs - something I haven't had so far with orchids.
__________________
Ross
http://orchids-ross.blogspot.com/
I don't do most Dendros or large, "floofy orchids". For me it's minis (like Angraecoides), Masdies, Paphs, and others that crept in somewhere along the line. See my orchid list for complete collection (usually not current.)