Not to be glib, but... most webdevs code to the standards? News to me. Most webdevs code to their favorite API. And their favorite APIs code to an insane list of quirks. No one but book authors seems to care about standards.
Your web devs must suck then dude. I don't know a single web dev who doesn't go out of their way to provide the best range of browser support possible.
I would consider that a contradictory statement. In order to provide the best range of browser support it is usually necessary to not code to web standards to support older browsers (that do not support latest web standards) or to support newer features (vendor specific CSS, etc).
I bet every single one of them let the Presto engine die because they did not test with Opera.