"Computerised imagery cannot be termed experimental because for that to be the case there always has to be the potential element of failure"... a brave statement, but for what purpose? Failure-success, right-wrong, bad-good... If it is the one or the other obviously depends on your point of view, your vision of the final result, if you achieve what you have envisaged or not. The risk of not doing that is always present. If you are not satisfied with your result it is a failure, no matter if you do it in darkroom or lightroom or whatever process. I don't see the meaning in categorising along lines as defined by the quotation. It sound more like an effort of saying that the way the author is working is some how more genuine, better and more arty than working in a digital workflow. It would be like stating that electronic digital music composing cannot be experimental.