The "ice cube solution" was something dreamed up by a particular commercial grower of Phalaenopsis. Not that they would EVER use ice cubes on orchids!
I occasionally check labels on orchids that are sold at our Lowe's, and yes, the ice-cube watering method is still on some labels. I still have folks tell me they ONLY use ice cubes to water their Phal. and they swear their plants are healthy. I would never use them myself but I have a hard time telling these particular folks that they are wrong. I do tell them to be sure the ice doesn't touch the plant, whether it be leaf, stem, or root.