Jobs: Gallup's Unemployment Survey Shows No Improvement; Underemployemnt at 19%

Readers know about how we treat official unemployment numbers, both from the Dept. of labour, and from ADP. Some are just ridiculous.

Gallup publishes related numbers for employment and, more importantly, underemployment:

Is there any visible improvement in "employment" or "underemployment'?

Methodologly: Gallup's U.S. employment measures report the percentage of U.S. adults in the workforce, ages 18 and older, who are underemployed and unemployed, without seasonal adjustment. "Underemployed" respondents are employed part time, but want to work full time, or they are unemployed. "Unemployed" respondents are those within the underemployed group who are not employed, even for one hour a week, but are available and looking for work. Results for each 30-day rolling average are based on telephone interviews with approximately 30,000 adults. Because results are not seasonally adjusted, they are not directly comparable to numbers reported by the U.S. Bureau of Labor Statistics, which are based on workers 16 and older. Margin of error is ± 0.7 percentage points.

Their current number for "underemployed Americans" is 19%, esentially the same as it was in Feb 2010. How is this possible? Which number should you believe?