Very valid point there dude. I don't know dude...maybe I just want things to be efficient right from ground up...Or it could be the after-effects of falling in love with Functional programming in Scala :)
A certain language might be twice as fast to get work done in, but you can be 10 times as fast if you are enjoying yourself and motivated.
I just wouldn't kid yourself that scaling is the reason for the choice. Just enjoying it is plenty of reason.