No, at least not due to the new legislation in effect for this year that delays refunds containing those two credits to not be released until 2/15/2017; however, there are other possible reasons for delay. Last year, the IRS could release refunds for at least 8 out of 10 returns within 21 days of acceptance.
Note: Acceptance should not be considered to have taken place until the day the IRS was officially open for business this tax season which was 1/23/2017. There is the potential to be in a test batch, but that isn't guaranteed.