The current consensus is the closest that science gets to "truth". Depending on your definition of "groupthink" (which seems like a deliberately pejorative term), either that describes most categories of knowledge, or we can suggest that the difference is that there is a rigorous methodology and system of verification for these beliefs.

Consensus does not have the best track record in science. Much better is the actual evidence and experimentation instead of what people who call themselves "scientists" think about the evidence.

Consensus is the track record of science. Observations are not theories.