I just made it through the longest lag time I've personally faced with an ale to date. I decided to go with one vial of WLP002 for a stout I'm making and thought I might have pitched it at too low of a temp (60 F). I know the recommended range for this yeast is 64-68, which is why I chose it due to my basement temps, but I didn't realize that it would take almost 36 hours to really show signs of activity.
After that long wait, I am happy to say the yeast are happy and doing what they do best at a comfy temperature of 64F.