Yes he should:
1. 6 for 6 at 5 different tracks over all surface types: wet dirt, turf, fast dirt.
2. 6 for 6 whether on the lead, chasing, stalking/closing, bad start/good start...
3. 6 for 6 even even though in most races was the only one keeping loose frontrunner occupied, then drawing off--especially tough to accomplish on turf, did it 3 times. Even more impressive example may be Fla. Derby: bumped out of the gate on speed-biased track, then had to go chase & collar loose front-runner...and not fall susceptible to any closer at that longer 1-1/8 route distance while not bouncing from previous grueling duel on sloppy surface.
3. Pedigree best suited for classic international distances(1½+ mile), making him a candidate to not just win here, but to travel overseas and be a champ there too. No other contender in this country has the credentials / pp's to even dream of trying that.
4. Very fresh & plenty left in the tank:
A. no workouts for more than 3 weeks after race previous to Derby, and Derby was only 2nd race in 13 weeks.
B. Derby took "nothing" out of him: eating like a lion afterwards, kicking down the barn next day.
5. Tons of upside potential still left:
A. Figures from race to race still increasing exponentially(adjusted for trip/trouble)
B. Lightly raced, with races extremely well-spaced
C. Not pushed late in Derby...to boot while:
D. Posting 24-1/5 coming-home time in a "dirt 1-1/4 mile route after stalking fast pace"--last four furlongs averaged 12-2/5 each actually.
E. Excellent Derby fig considering not optimal early trip and not pushed late.
6. Complaints of closing horses with bad trips in Derby do not hold sufficient merit to label them solid threats:
1. Barbaro's start, early trip & wide position could were also not optimal.
2. With the exception of clean-trip Jazil, everyone else still lost further ground late to the winner.
3. A closer wanting to overtake someone in front throwing 12-1/5, 12-2/5 final furlongs would need to produce almost-unheard of 11& change final fractions, & even then Barbaro can likely beat 12 also.
All this being said, I would advise everyone to demand excellent morning clocker & physicality reports as occurred prior to Derby & to NOT eat win chalk in the Preakness: BUT a place or show bet, if within a dollar of the win payoff I would consider a very safe investment: this is how i handled both Funny Cide & Smarty Jones during their runs-- actually parlaying Preakness into Belmont with substantial starting wagers.