I got reply from alfresco support, that they are not able to provide any statistics.
Now, It is really difficult for us to convince customer. Everything is based on performance, customer wants to compare available products in the market based on performance before implementation. So i thought i could get some information from forum, on some existing implementation.
Anybody on the forum implemented Document management on alfresco 4+ .. please help me by providing performance statistics on your implementation ..
Thanks