I'd add a year to the regional job estimate. Then, after five years at the regional, you should have 1000 PIC turbine, which has sort of been an unofficial benchmark to move up from the regionals.
Remember, too, that some of the regionals are majors. Some of the regionals have pay scales that are nearing six figures, too.
The coveted "major" jobs are few and far between these days. Hopefully, things will turn around for the bigger airlines and more really good jobs will open up. But competition for the best jobs will be fierce.
The "regionals" have been growing leaps and bounds with their lower costs. I think this takes some flying away from the legacy carriers (what most consider the best jobs). So...as nice as it is to see hiring and fast movement at the regionals, I think some will be stuck in those jobs for very long time. It will be up to the regional pilots to keep improving their contracts to make those career jobs.
To sit here and tell you can make it to the majors, especially in this day and age, would be like some of these big academies advertising schemes. Some will make it to the majors, and some won't. There is a lot of luck involved and things outside your control that can get in your way.
Will you make it? All you can do is give it your best shot. Prepare yourself as best as possible and keep your fingers crossed. Network like crazy.
Lastly, I'd like to say that if you're gonna persue this career, you'd better do it because you LOVE flying. That way, if you don't make the major leagues and the big bucks, you'll still be happy doing something you enjoy.