Good grip means that there will be no screetching sound, bad grip means your tyre is sliding and screetching.
Please check the manufacturing date on your tyre. This can happen when tyre looses all of its oil and gets hard. Facing the same issue from continenetal contiecocontact, but they are 40,000km and I'm going to change them next week
If it was fresh when you bought it than please rotate the tyres from front to back.