After the processional season opener in Bahrain, assessments about the success or failure of F1's new format have taken a back seat to the weather.
Rain either shook up the grid order or spiced up the grands prix in Australia, Malaysia and China, meaning that the question of whether the rules should be adjusted has been muted by arguably artificially-exiting races.
And the wait for clarity about the success of the 2010 formula, including the new ban on in-race refuelling, could now be extended into yet another race.
It is currently cold and wet in Barcelona, where about a half-hour north in the suburb of Montmelo round five of the world championship will be staged at the Circuit de Catalunya later this week.
The weather forecast for the city is for intermittently light and heavy rain showers throughout the week, with regular precipitation likely to remain a possibility until at least late on Sunday night when the skies could clear.
Presently, the forecast for Saturday - the day of qualifying - is for a cloudy day with a small chance of rain, while light rain in the morning is expected on race-day Sunday.