My suspicion is that people object to calling this persons' claims essentially a lie, which is just the truth. It is dishonest to use the performance numbers of an incomplete project while listing the features of the complete project, which will certainly decrease performance. The website is replete with obviously absurd claims, like a completely baseless claim about throughput that assumes compile time is linear in code size.
But what's actually pathetic in this affair is the anguish and upset of a bunch of internet nerds over a project that has received, in its 3 months of existence, less than $2500 USD. This is peanuts, but everyone is outraged over a "scam" because the real scam is open source getting a bunch of people to work for free, hoping at a chance of getting peanuts like this.
Please refrain from personal insults and take the time to read the guidelines before commenting further.