And while this thing doesn't really meet that label at its present scale, it is conceptually far closer to those early supercomputers than what an iPad is, both in how it's structured, the parallel nature of it (16 ARM cores; 128 Epiphany cores), the shared memory (within each Parallella) etc..
So yes, you're being grumpy about a title where it takes about 10 seconds to figure out that this isn't actually about someone building stuff aiming for the Top500.