Simple Answer, no it wasn´t. Just gossip from jealous People.
Consult their Forums, to understand what really happened. This Mod, is the Mod of the Year 2006, on ModDB. And the Developer didn´t steal, but tons of others wanted their Mods incooperated, into his Mod. Simply watch the Video and watch how many Credits he gave.
I also had to point that out on other Forums. No Fake, nothing got stealed, the Developer is not an Ass and he is a pretty experienced Game Developer, from the Turkey.