ERCOT [Electric Reliability Council of Texas] said the grid's frequency dropped suddenly when wind production fell from more than 1,700 megawatts, before the event, to 300 MW when the emergency was declared.
But they had a plan, and immediately cut 1100MW to interruptible customers, thus saving the grid from going down. Soon they were able to fire up other production facilities and have everyone back on line.
The biggest drawback to wind power (there are a few) is that the wind is notoriously unpredictable. However, as long as there is a backup plan, wind power can be a good additional source.