The experience in countries with different public attitudes is probably very different. Here in the US, a large minority of the population outright believes in not just "ID" but six-day, young-earth creationism; in many parts of the country, the majority of students will come in actively predisposed to advocate "creation science" and it's likely the teacher will too. In many cases we're not even talking about what happens in a class with a good, competent biology teacher, but what the state can force onto the curriculum in a class with a teacher as ignorant as the students. Which is probably a lost cause anyway.

That said, I'm less despairing that many people who have reacted to Bush's comments. I think the "Intelligent Design" movement is basically a rear-guard action; this wave of creationist advocacy started in the 1970s and 1980s with school boards trying to get the hardcore young-earth stuff into official curricula, and they had the support of President Reagan among other people. That hasn't succeeded so now they're falling back on the notion of miraculous intervention into evolution.