I really wish people that throw accusations around would do the math themselves to find out the truth. Before they start spreading false information around.
The only real smoking gun is empty blocks. Now core sheep often say antpool mines a lot of empty blocks. But they never provide any data on the subject.
Antpool mines around 18% of all empty blocks. Which is right in line seeing how over the past year they have had 18% of the network hash rate. Which also means they mined 18% of all total blocks.
Here is some numbers comparing three different pools controlled by three different entitys.  Taken from 4/06/16 to 4/06/17.


All you have to do is compare each pool found block to hash rate. For example I will show you stats for three pools. One of the pools is Bitfury. It is really hard for me to think that a company that received 90 million from investors is using Bitmain miners. So they shouldn't have any asicboost tech.

Antpool. 18.71% of network. 10,224 blocks found.

Bitfury. 9.00% of network.  4,919 blocks found.

Kano ck pool. 1.89% of network. 1035 blocks found.

As you can see Antpool is 9.89 times bigger than Kano ck pool. Kano pool found 1035 blocks.  9.89x 1035= 10,236. Which is less of a 1% difference when compared to Antpool 10,224.

Now let's check Kano to Bitfury.
Bitfury is 4.76 times bigger than Kano.  4.76x1035=4,926. Pretty close to Bitfury's 4919.

Now let's check Bitfury to Antpool.
Antpool is 2.07 times bigger than Bitfury.  2.07x4919=10,182. which is less than a 1% difference. Close enough.
Antpool performs within 1% of other pools.
This is an obvious attempt of core trying to confuse non miners. So people will continue to voice out against anything but segwit.