if someone came into Compass today, with 4000 total time, 1500 part 121 SIC time, how long would it take to upgrade? And then how long on reserve? eternity?

Also, on their recruiting page, they indicate quite a few people have gone to Delta.. is that left over from the flow they had a few years back or does Delta actually hire Compass people fairly regularly?
Reason for asking: regional I'm at rarely has anyone get hired at a major.. nearly everyone has to make a lateral move to another regional, or a smaller step-up to a place like Frontier or Spirit, etc, before getting a chance at a major.

I don't want to make extra career moves and screw myself seniority-wise, but I also don't want to become a bitter lifer at my regional like some are….