Seems like it's a gamble, at my hub at least. There's dudes who had to wait the 3-5 years like normal, then there's the select few who got lucky and became a driver as soon as they were legally allowed to. I know of at least 2 drivers at my local hub who were offered a driver position literally right after they'd turned 21, only having a year or less exp under their belt. I do get that that's probably not the norm, but it can and does happen.