This is correct, only about 30% of Mormons worldwide are "active". And what they mean by active is not very active in comparison with a JW publisher who regularly attends meetings.
In all countries that include religion in the census a clear pattern emerges. Far fewer people identify themselves as Mormon than the church claims as members, whereas far more people identify as JW than the Yearbook claims as publishers.
Take Mexico for example.
Mormons claims 1.4 million members in Mexico, yet only 300,000 identify themselves as Mormon.
JWs on the other hand claim 800,000 publishers in Mexico, yet more than 1.5 million people identify themselves as JWs.
What's more, the number of Mormon congregations has been declining in Europe for years, whereas until now JW congregation numbers have increased or remained steady in most countries.
In Britian for example there are 1,613 JW congregations compared with only 333 Mormon congregations, down over 10% from a peak of 374 in 1999.
Other countries show greater Mormon decline.
In France there are 108 Mormon congregations, down from 128.
In Germany 166 down from 188.
In the Netherlands 33 down from 43.
In Italy 101 down from 133.
Figures taken from the pro Mormon website:
http://cumorah.com/index.php
