I filed on the 1/17/18, it was accepted. I know they didn't start doing stuff with them until 1/29. My estimated federal refund date was 2/7/18. How accurate is it?

I am just curious how accurate is the estimated federal refund date is? Says mine estimated date was 2/7/18 and it is now 2/9. Is that normal? Has anyone received their refund? Do I fall under that category of not getting it until later in Feb?