In reply to getlostoutdoors:
Interesting question, but I think you need to frame it more precisely to get meaningful answers.
I perform 'best' when everything is on my side. Indoors, above a big thick crash pad, with all the holds painted bright colours, with someone who's better than me telling me exactly what to do, well fed and rested, spurred on by the glory of doing the problem dead smoothly in front of someone I really fancy, I will climb the hardest move.
If that's the comparison, I climb like shit on trad routes above my gear.
On the other hand, if the comparison is a trad route where I can easily sit on gear or walk away, where nothing is at stake, then I climb better when I'm forced to. I like to have the illusion of total commitment to help dig deep and get through a crux. Usually it is an illusion - if you fall off most routes, you'll probably be fine, even when it feels like if you fall off you're going to die. I hate falling off. If I'm above my gear on a big cliff I will do just about anything to avoid falling, and often this means really trying hard on a move I don't know if I can do (but it won't be confidently slapping for a decent hold, it will be trying over many attempts to get the hold in the most static, reversable, risk-reducing way possible, and only if that is a total dead-end will I, heart-in-mouth, "watch me, I'm coming off" slap for the hold.) In that respect, I perform better when scared, compared to when I've got an easy way out.
But more generally, I climb far better when I'm confident. If the cliff and the route are inspiring, and suit my climbing style (brainless yarding on holds up steepness) and I think, "yeah I can do this, it's not bad" I will climb much better than when I'm totally psyched out. Some cliffs inspire confidence - a nice steep juggy bit of Lewisian gneiss like Sheigra - while others fill me with dread - Pentire completely psyched me out just by the look of the place. A bit of chalk on the holds helps an awful lot too..
Post edited at 00:06