The short answer is yes and no, depends on whose CASS system you're using. If you can bring us the print out, you're golden.
The CRJ-900 only takes a weight hit when it's carrying 13Klbs of fuel or more. That's typically PHX-MEM, PHX-DSM, OMA-PHX or any time we're going somewhere over 120 minutes flying time with a distant alternate.
Anything east coast, other than CLT-MSP, it would be extremely rare to take a weight hit.
Hope that helps. BMM