Terry Friedman of "The Educational Technology Site: ICT in Education" conducted an on-line poll asking, "Why don't teachers use ICT?" You can see the results at this article.
Although I am sure these results are "unscientific" I applaud Terry for asking a good question. Good questions are amongst the most valuable things in the world. Even if the results are not perfect they will lead to meaningful conversations ...which should translate to better educational experiences for kids.