Deviation or Psyche

[helene_t]

[...] that a 4-4 fit might play better (at game level or higher) than a 5-3 fit, or 3NT often scores better than 4M with a 3334 opposite 5332.

 

This is knowledge that bridge players gather over their bridge career that is not related to their partner or partnership.

Yes but to what extent you tune your bidding agreements to take advantages of this is partnership understanding.

 

For example, if the auction starts

1♥-2♥

there may or may not be an inference that responder can't have four spades and three hearts. This is partnership dependent.