In reply to CJD:
> for instance, will more technical axes make you a better climber?
depends what you are doing really. My case nope but someone with the requisite skill level would be boosted by it.
> will a canon eos 5d camera make you a better photographer than a 350d?
i suspect you get into diminishing returns (personally i cant be bothered with a slr yet cos it to learn how to take advantage would take time).
However it may give better photos, eg for digital the capture speed.
Most of the time a skillful person would be able to compensate for this, but that is arguably skill wasted on the compensation as opposed to the main pic.
> the thing that occurs to me about climbing gear is that lighter can mean faster, which is good, but apart from that...
better protection - allowing you to push your skills and develop faster or shoes definitely improve performance.
> would you get rid of something that you didn't perceive to be 'performing' or would you stick with it and work to improve what you got out of it?
depends how much it cost really, but i would tend towards testing it first, eg for my mountain bike i have it rigged in a way that suits my style rather than try changing my style it makes sense to get a bike that compliments it.