LOL I'm pretty sure 'blabla' was their way of hiding their domain name, unlike the more traditional example.com.
Anyhow, @gdf The download speed will depend on many things, including how much bandwidth your hosting provider allocates per connection, maximum throughput, network conditions, and your own network speeds.
I try to remember to use example.tld for my posts. But, it'd be rather American (part of our lingo) to say 'blah blah'.com - much like the rest is 'filename'. I presume those are made up and the user isn't familiar with example.tld/foo.tar.gz - or the likes.