Ageism outweighs racism and sexism?

From Reuters:

People in Britain are more likely to discriminate against you because of your age than the colour of your skin or your gender, new research showed on Tuesday.
The first national survey of age-related prejudice, carried out among 1,843 people, showed 29 percent reported suffering age discrimination — a higher proportion than for any other kind of prejudice including sexism and racism.
“Ageism is the most pervasive form of prejudice experienced in the UK population and that seems to be true pretty much across gender, ethnicity and religion — people of all types experience it,” said Dominic Abrams, professor of Social Psychology at the University of Kent.

I’ve never been one to believe in a hierarchy or oppressions or discrimination–they’re too intertwined. I understand that this report says that ageism is just more pervasive–not necessarily “worse”–than other kinds of discrimination, but it still brought up some issues (for me) about how we weigh different prejudices.
Any thoughts?