I would say theres alot of truth in that saying ! I always record temp,wind direction, weather, and any thing else i think could be of interest in my fishing log. I find often its alot harder in an east wind.
I find "wind" in general play a large part in trouts feeding, example i often find that when the winds "stiff" and most guys stand with there backs to the wind if i face the into the wind and brace the rather unpleasantness it pay huge dividends,often i take fish feet from the bank

As the winds generally blows the food to the opposite bank. However if the wind is really cold often the fish can be found in the more shletered bank and the guys who cant cast into the teeth of the wind will do well.
Gerenally i go straight to the bank the winds blowing on, often this out fishes the easier option of "standing with your bank to the wind brigade"