I read Contador not good anymore on steep short gradients and not indicative of his form?...
You're probably talking about Quintana, he's the one who can be average or even bad on those punchy climbs and still be in top form when it comes to longer climbs.
But you can see just about everywhere if Contador is in good form or not. His performance on any type of climb reflects his overall form. In the Tour 15', after Mur de Huy, I knew it was going to be a complicated Tour. In the Tour 2014', on every little climb from Yorkshire to Gerardmer, I could see Contador 100% of the time out of the saddle, almost not breathing. You just know how he's gonna do even before the first MTF. He's so predictable.
Don't fool yourself, if AC doesn't do well on a punchy climb, he's in average form or even bad and that will last long.
That will apply to the Tour 2016, stage 2. Short steep finish on Cherbourg-en-Cotentin, I swear if he's struggling that day, forget about the win. Sounds crazy, but I've watched him long enough to know that for sure.