Pilot Pete is on the money in my opinion.
The retirement age legislation will doubtless affect all airlines and broadly to the same extent. How much they will all be affected remains to be seen but command times are unlikely to go down.
As a recent FCA joiner, I was told around 8 years and this seems to remain the official line. We're retreating from the lower margin and more competitive short haul game a bit but are expanding long haul fairly quickly. 787, if it arrives, will help considerably in the long haul opportunities and, as has been said before, long haul is more crew intensive than short haul. My guess (and it's only that) is that, with a little expansion, a command could come round in as little as 6 years but it will take a huge event to reduce it any further than that. In contrast, some pretty small events such as age legislation could easily extend it to 10 years.
It's a long time, granted, but that's because we're not losing many pilots and there's a good reason for that. FCA is a good place to be at the moment (though it hasn't always been) so few are leaving to go elsewhere. For a charter, that says a lot. I suspect that a 15% pension, expanding long haul, a good Pilot Scheduling agreement (with healthy BALPA membership and a good CC), 787 orders (with options for more), strong parent company management, and a vastly improved lifestyle are some of the reasons. On balance, I'd say it's a pretty fair deal.