I've worked in about 10 financial institutions over my career. 6 top tier banks in the front office building low latency trading platforms. F# is rare, these places are huge so I cant say I've seen every team but where I've seen it be used (twice) the project has been dire. This was [a decent overview][1] from an experienced city consultant.


  [1]: http://blog.oxfordknight.com/?p=269