There seem to be 2 'groups' of testimonies, the first coming from law enforcement and government bodies; the overwhelming consensus was that existing laws are satisfactory to prosecute bad actors using bitcoin.
The second group is still talking; again extremely positive.. analogies to bitcoin being similar to the internet in the mid nineties; its scary but overall good. The lawyer from the bitcoin foundation is really driving home the idea that the main problem right now is that bankers are too scared to give bitcoin business bank accounts.
I see overall nothing negative; and the chairman seems extremely reasonable and open to the notion of bitcoin and brought up the bitcoin-now <-> internet-in-the-nineties analogy himself.
No one is asking for stricter laws, everyone is asking for clarity. Much, much more positive than I expected; only the secret service guy seemed to be very cautious; he never said the word bitcoin and mostly spent his time saying the secret service was awesome.