Which of the following is not true about the grapevine?

The claim that the grapevine is preferred over formal communication is not true, since organisations still rely on formal channels for official decisions.

The grapevine supplements rather than replaces the formal network.

It being faster than the formal network is true, as informal ties carry news quickly.

It being less accurate than the formal network is true, since messages get distorted as they pass along.

It being found in almost all organisations is true, as informal contact is universal.

So the false statement is the idea that it is preferred over formal communication.