My bike's better than me!
Joined: Feb 2005
Posts: 2,243
Likes: 343
From: Northern Colorado
Bikes: Moots Vamoots, 'Dale T2000, DB Response Comp, 1998 G. Fisher HKEK, 1989 Panasonic DX-6000, 1988 Fisher Montare XT, 1983 Nishiki Int'l, 1972 MB Grand Record, 1975 MB Grand Jubile, 1985 Centurion Ironman, 1982 Miyata 710
This one's pret-ty simple, folks: clamping to anything other than a build post (or the expensive equivalent sold by Park Tool) = some risk, no reward.
You can do what you want with your bikes. I'll continue to use the low-$ seatpost with mine. Takes about six extra seconds. Takes risk down to zero.
Don't mean to sound like my answer's the only one worth beans here. It's far from that. But I don't take chances with expensive frames or expensive components. Not sure why anybody would. As to Dave Zabriski, incidentally, if something does happen to his seatpost (or any other piece), they run to the van and grab another one off the shelf. It's not always fair to try to translate what team wrenches do into what you or I should do.
Just my $0.02. YMMV.