Fast track
Fast tracks DO indeed happen at the time being, but as 1013 correctly pointed out, it completely depends on the company.
Currently, upgrades on the B777 are going so fast that they need every guy that is eligable for command, so if you have the fast track criteria, you will get a command pretty soon. (The FOM states 18 months, that is the Final Line Check date).
Don't be caught out though, if you have a look at the seniority list, you'll see that after September 2004 most new F/O's were hired on the B777. Although the command time right now is still exactly 3 years on the B fleet, pretty soon it will go up as well, maybe only just over three years. The catch is that (according the rules in the FOM) no fast tracks will be done as long as there are enough candidates who have the 3 year criteria.
Basically, it comes to this: if you are eligable for fast track, you MIGHT get a command before three years, but it is absolutely NOT A RIGHT!
On the other hand, after three years when it is your time according to the seniority list and if you behaved (have all the criteria), it is your right to go for an upgrade.
So, if I were you, before considering coming over to join, have a good thaught about 4 years to command. If you can live with that, consider the rest of the package. If you think 4 years is too long (you might get better oportunities where you are now), don't even think about the rest, because chances are great that you will end up bitter for not geting that fast track you expected.
MR8
PS: Looking at the seniority list how it is now, I think fast tracks will finish soon. Airbus commands coming down to about 3.5 years, Boeing commands will go up to around the same amount of time in a few months. No reason for fast tracking anyone.