I have four keikis on two different Phals that started growing around October 08...till now not a sign of a root. They all have three leaves each. They are just driving me crazy. As a test, I wrapped one of them using sphag and held it in place with dental floss I spray it nearly every day. This was a month and a half ago but till now, no change.
I think basically, they take their own time in growing roots or leaves. We have to be patient.