I doubt it was ADS-B over 1090-ES. My understanding is the ADS-B rollout uses UDA to exchange data air to air and to upload data from the radar mosaic. This is deployed in a relatively small are. However, much of the US has TIS (displayed by a 330 and 430/530 typically) and this would be common on US aircraft. Which is why, with no mandate to go mode-s, over half the US fleet went out and installed Mode-S.