While I still have not tried any of the Clocktower brews, nor any of the Thew brews, I now have a small sampling of opinions from people whose opinions I trust.
Clocktower: my friend said, "Passable beers, nothing special."
Thew: a different set of friends said, "Their stout needs a lot of work. The other beers are pretty good."
No one cared to offer any more on these breweries or their beers. In my experience with these former and current brewers, I understand this to mean that they found no special beer nor special reason to visit these breweries. Perhaps I will be surprised by them when they show up at these breweries more often than I thought they would (the two guys who visited Thew already show up more often at Backpocket in Iowa City more than I expected, principally for their birthday boot). Anyhow, I'm sure that everyone has a slightly different taste requirement. So please, DO NOT let these opinions influence your decisions. All independent breweries are better than macro brews. So support your local brewer.