I wasn't really sure if I wanted to release this spreadsheet that I made, but it might help some people with some what-if scenarios if they jumped ship for a flow or faster upgrade. That being said I think the fast upgrades are over for now after The Great Reshuffle of 2014-2015.
This is a purely what-if calculator. If you want to see how long it will take to flow, just sub the CA seniority with the seniority of people flowing and sub the upgrades per month with flows per month.
http://bit.ly/1EykOQh
Remember that upgrade isn't everything and the numbers that are being predicted often are not the numbers that come true. Please don't base your career decisions off this spreadsheet. It's simply a tool to see where you might be using foretasted numbers.