I know I shouldn't "disagree" with you, Glen, me being a newbie and all. But I use the "check for condensation on the inside of the pot"-method with my Phals as one of the indicators as to judge whether I should water or not. I've noticed that the condensation level decrease over time as the medium dries up, and I also know approximately how much moisture there is left in the medium after accidentally knocking one of my Phals over when there was a certain level of condensation on the inside of the pot.
This in combination with checking the roots and the weight of the pot+plant is what I'm using to try to figure out when to water.
The Paph got thoroughly watered when I potted it and I did the same again today - I prefer under watering to over watering, since the latter is harder for the plant to recover from, if I've understood things correctly.
Whether or not this is a good method, only time will tell. So far it seems I'm doing good, but things can change rapidly and if it does, then I know that upping the watering frequency can be a way to fix the problem (if it's related to dehydration that is).
But thanks for the heads up anyway, and the Paph wasn't totally dry when I watered it (the Phal owner in me screamed at this).