No he was found 1 year after the events of IM2/TIH & Thor. His waking up moment would probably have not been too long after.
If the Widow says 2 years since Banners last Hulk-out, then Cap has been thawed for about a year before Avengers (unless it took Shield another year to figure out how to thaw him)
When or where did BW say that?? 2 years since Banners last Hulk-out