It's only test net and you must not take it as your main consideration dude. as far as i know the real hashrate can be determined when it comes to the main net and we can know about how much miners.
It's similar as another testnet because this is just an alpha network and the control is still holding by the team. I never take test net as my main consideration to determine that will be giving the real information or fake information. the hashrate in testnet can't be trusted