OP.GG true or false?

Noticed that there was a "Check MMR" button, I'm still in my provisional matches(halfway done). But in the Check MMR thing I mentioned, It said that my MMR is around 1300-1400? Can't remember, It said that I would be most likely placed in Silver III(First time ranked on the acct). Just wanted to know if it's close to accurate? Just so I won't be happy to get into silver and to end up in Bronze V :/
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