Vincent Müller and Nick Bostrom have just released a paper surveying the results of a poll of experts about future progress in artificial intelligence. The authors have also put up a companion site where visitors can take the poll and see the raw data. I just checked the site and so far only one individual has submitted a response. This provides an opportunity for testing the views of LW members against those of experts. So if you are willing to complete the questionnaire, please do so before reading the paper. (I have abstained from providing a link to the pdf to create a trivial inconvenience for those who cannot resist temptaion. Once you take the poll, you can easily find the paper by conducting a Google search with the keywords: bostrom muller future progress artificial intelligence.)
If I have a statement "X will happen", and ask people to assign a probability to it, then if the probability is <=50% I believe it isn't too much to a stretch to paraphrase "X will happen with a probability <=50%" as "It could be that X will happen". Looking at the data of the survey, of 163 people who gave a probability estimate, only 15 people assigned a probability >50% to the possibility that there will be a superhuman intelligence that greatly surpasses the performance of humans within 2 years after the creation of a human level intelligence.
That said, I didn't use the word "could" on purpose in my comment. It was just an unintentional inaccuracy. If you think that is a big deal, then I am sorry. I'll try to be more careful in future.
The difference here is that you considered this position to strictly imply being against the possibility of intelligence explosion.
One can consider intelligence explosion a real risk, and then take steps to prevent it, with the resulting estimate being low probability.