This is looking a lot like a tire discussion. Isn't the main thought that we all want to do what is safe for everyone and have an enjoyable trip? Thought so. Certainly no expert, but to my way of thinking the faster you're going (or WAY too slow under traffic flow) just increases the chances of a problem. I still don't, and probably never will, understand the mostly male desire to go faster and faster regardless. Sure at least one person of the male persuasion will take offense, but you know it's pretty much true. Just try to explain, however, to the family alongside that you just wiped out that you were doing 75 because you could. Be sure to check on your own family while you're at it. Just because you can, doesn't' mean you should.