I had the tea (I think it's bloody awlful) started at 34wks on one cup a day for a week then 2, up to 3 by 36wks.

DS was induced at 36wks due to preclampsia but I was already 4cm dilated (had being having mild cramping for a a few days) labour was 5hrs with syntocin

DD was induced with ARM 4 days over as again I was 3-4cm dilated and was over being pg (long story) drank 4 cups the day before induction was up most of the night with braxtons and prelabour, waters "probably" broke that morning before induction as there was nothing there and bub was born 3 1/2 hrs from ARM 2 hrs after contract became regular

For me, I reckon the RLT worked but I wouldn't recommend the 4cups labour was extremely intense!