They may be able to get close BUT they would be crippled using UDK. You need source code access instead of only a scripting language so you can do advanced things :). Last i checked this cost 500k for unreal :) This is why a lot of developers extend on Ogre/os engines instead of using udk/unity where you are going to feel…
It's nothing to do with that. With the right APIs, it almost makes no difference which language you use as long as it's not something like BASIC. (which isn't a bad language, it's just not suited to large projects) Even if UnrealScript were "99% JavaScript" (it's not, it's about 60% Java, 10% C#, 30% Visual Basic - look at…