Although the idea of quickly being able to create content might sound fantastic, it certainly has its disadvantages. Firstly, Google don’t like badly written content. In the past article spinners have been renown for creating poor quality content. Badly written articles are something that Google hates and you won’t make any human friends with it either.
Imo it is not possible for google to detect properly spun content, it is not worth computing power it requires. They can do this using ngrams for example, but it is uses a lot of queries. And for example article spinner I coded beats this algo, so google cant detect that the content is spun. Manual spinning is also good but it takes more than 30 minutes per article.