I find "World Premier" etc to be tacky lines. New Work, or New Play etc are sufficient.
There seems to be a sense of grandure in the word "Premier", which I suppose could be considered a good thing for making a show stand out to the prospective employer, but I believe it could also be interpretted the other way, portraying you as someone who likes to embelish or enhance the truth of the matter (often with new works, the truth of the matter is they are mounted with minimal funding and without much noise - at least that is how it tends to be in Australia, then after being mounted in a small house, some big name producer comes along, buys up the rights, and it has a large premier with a major company - and no, I'm not that bitter)