Rod Hull now spotted single line descriptions in the AdWords ads on the Google search results.
You can replicate this by searching for [ebel 1911]. Here is a picture:
Prior to that, he spotted AdWords ads that wrap, which is not something we had prior to Google Instant.
I don't believe I ever saw one line descriptions or wrapping AdWords ads prior to Google Instant. Maybe it is a bug or maybe a feature?
Forum discussion continued at Search Engine Watch Forums.