Depends on the whiskey. I am currently loving the current batch (B520) of Elijah Craig Barrel Proof. A little lower proof than normal, but still weighing in at 127.2 proof. Also digging my Blanton's Straight From the Barrel. This one is weighing in at 135.2 proof, but you would never know it as it drinks below its weight.
I have never been impressed by any other Texas bourbons that are cask strength. They are young and drink hot!
Obviously you haven’t had IronRoot Harbinger or Kiepersol Jimmys
I wasn't aware that Jimmy's made a cask strength bourbon. I will be on the lookout for it. I have had their 90 proof version and thought it was just okay.
While I will say that the Harbinger is better than most Texas bourbons, I still don't love it. Been to the Ironroot distillery and met both of the Likarish brothers at tastings in the last couple of years and I think they are doing things right and I know a lot of folks love it.