How do you know they aren't as good in technique? If they can play a piece at sight better than you, then they have better technique then you. Pure and simple.
................... do u know what technique is
imagine this: one person practices piano by playing random simple pieces
one person practices piano by playing scales/hanon over and over (obviously they wont be needing to read music to do this, because it's just a simple pattern you repeat over and over)
the second person will definitely have more solid touch/more nimble fingers, i.e. better technique, because hes playing excercises that are specifically designed to improve finger speed and strenght
the first person will obviously be better at sight reading... cuz he reads music all the time while the second person doesn't
"if they can play a piece better than you, then they have better technique than you. Pure and simple."
it should be clear that the above statement is a gross oversimplification... how do I know if someone doesn't have as good technique? based on how clean their notes sound and how fast tthey can hit the keys. If I am able to hit the keys cleaner and more rapidly, I have better technique, "Pure and simple" < ----- to use your irritating, unnecessary, condescending sounding phrase you pulled out of ImAHugePrick.com
jk
jk that i was jk, l0l n00b