It's just poor writing. The "Internet style" dictates that if you can't put something in bombastic absolutes, it's probably not worth writing down. The cluttering up with qualifications, then, is a sign of honesty, rather than the opposite.
In a more civilised age, the author might have written [Python's implementation of regular expressions is] really good and very interesting.
In a more civilised age, the author might have written [Python's implementation of regular expressions is] really good and very interesting.