Yes, the article even states that in the first paragraph. Processing a few GB (the example in the post is not even in the two digit range) is easily done with basically any tool. Heck, someone could probably pull off something like that in Excel in a couple of minutes.

I think the point if the article is exactly that: Unless you have a couple of TB to process don't even bother. I remember a similar post in the same spirit that had a couple of GB in a Postgres database and ended like "Just do a simple query!" instead of a Hadoop cluster for simple map-reduce.