So she more or less included an equivalent of a cover letter printed on a colored piece of paper in which she noted the filing is DV based. The note most likely didn’t make its way to the IO, just like cover letters typically don’t. It’s not like she formally submitted an expedite request per USCIS guideline. The Chicago Lockbox already has a process in place for identifying DV based cases before forwarding them to the NBC per this
2012 USCIS Florida Bar Q&A Session:
“DV cases are initially identified by the Lockbox. When the Lockbox identifies DV cases, a coversheet is placed on the file indicating to NBC that the application is a DV case. As these cases are received at NBC, they are sorted and shipped immediately to the Field Office with jurisdiction. Interviews for these cases are manually scheduled by the Field Office with jurisdiction as soon as possible.