No, that's a misuse of the fallacy. To stretch it to breaking point, I am currently here with a 'true scotsman' of an actually working 'agile' process and it's

No, that's a misuse of the fallacy. To stretch it to breaking point, I am currently here with a 'true scotsman' of an actually working 'agile' process and it's all going well :) All you're saying there is that people have started using the term 'agile' too much, and applying it to processes or methodologies that aren't agile in the sense it was originally defined. I can totally agree with that idea, but it's a different problem – not "agile doesn't work", more "people consistently lie about being agile".