No, the random number generator at CoinPoker delivers about the same results as any other well-tested RNG in use at any other online poker provider. It's not any worse than regular randomized dealing mechanisms, but it's not really much superior either.
Even though it incorporates user input into the shuffling process, the CoinPoker RNG also includes data from the poker site itself. Therefore, you still must have a certain degree of faith in the integrity of the organization. There's no reason to conclude that there's anything to worry about in this department, but there's also no reason to suppose that the innovations pioneered by CoinPoker in this area are anything to write home about.