It's still very, very early in the Q3 GDP forecasting game so I wouldn't get excited about the moves in this indicator for at least a month.
"After this morning’s releases from the US Census Bureau and the Institute for Supply Management, the nowcasts of third-quarter real personal consumption expenditures growth and third-quarter real gross private domestic growth decreased from 2.9 percent and 2.0 percent, respectively, to 2.6 percent and 1.6 percent."
