I think it depends on which list you are on. I was waiting 18mths to get a call from SDCC. DLR did a draw in April 07 and I am miles down on that list so it could be another 18mhs for that.
DCC also do a draw but I think (open to correction) they do on eevery few months so you could be lucky and pulled out of the hat quickly.
I don't know what way Fingal do it.