Perl, is impossible to manage on a large scale ( Read multiple development centers ) as every script is as unique as it's developer.

I can't accept or believe this. I see no reason why perl code should be any different from Java in this regard. I think it more comes down to mentality of the people involved. Project managers in perl have a lot of architecture related decisions to make before a large project can commence. In the Java world these decisions are made by the language so they need not be contemplated. Of course as a project manager/architect i would prefer the flexibility of perl, and the added responsibility of making wise decisions than the rigid framework of Java. But I think many project managers I know, (especially those from the "business side" of things) would prefer Java because then they dont have to make those decisions, nor be responsible for their outcome.

Part of the reason i say this is that a large perl project need not have more than one "script", being entirely composed of modules and objects that do the actual work.