The answer to this can only come on a case by case basis. The consequences of refusing to submit to a blood, breath or urine test are as follows:
Taking a chemical test and "passing" can avoid either the charges being filed or can help secure an acquittal at trial. It is important to understand that even if you "pass" a chemical test, police can still charge you with DUI under the "impaired" theory. Failing the test will provide the prosecution with strong evidence against you whereas refusing to submit to a chemical test can not even be mentioned at your trial. Thus, the decision is not an easy one and should only be made after consulting with a DUI lawyer.