Google seems to be testing an AdWords display for jobs ads that includes an automatically-generated extra line of description that includes the number of jobs available and reiterates the brand of the advertiser. To make room for this third line, the two description lines are combined.
Presumably the number of jobs comes from Google Base uploads by the sites advertising, as it appears to be dynamically generated by Google.
The apparent test was spotted by James Carswell of Periscopix in the UK, who notes that the sites showcased in the test are all using the Madgex job board software.
Google is always testing various options for displaying AdWords, and introduces them widely if they seem to have a meaningful impact on performance.