I have brewed on a Sunday and pitched on a Weds several times, with the wort at room temp the whole time. I didn't know it was this big a deal. The beers have been fine, though I do understand that waiting increases the risk of infection. I suppose I will try to clean up my act and pitch within 24 hours or immediately. I consider my sanitation to be good which swings the odds in my favor. So waiting a few days can be done with no need to dump as someone suggested but apparently that's not best practice. Who knew?