I am conducting an experiment on s/h, I have taken lots of before and after pictures, but one month is not enough to say for sure. At least my phals haven't died (4 in total) but I still haven't seen signs of new growth. They seem to have survived the first shock of total medium removal.
However one was blooming its last bud on a spike (at least 6 months old) and it shrivelled almost 1 day after repotting, one was in spike and blossoming and did not loose any of its flowers (6 in total), until they died of "natural causes, as they where first opened in December, and the third is still growing the spike it had before, and it seems that 5 buds have formed on it.