Canadian scientists protest gag order, go straight to public with own website
boingboing.net
boingboing.net
In the first model, the government asks its scientists to research something, they come back with an internal whitepaper, and it decides when, how, and if to report that publicly, controlling the external message. Similar to how staff scientists at a company operate. In the second model, publishing and media-interview decisions are made at a fairly low level, sometimes with individual scientists directly publishing results without managerial review. Management may still run strategic PR campaigns highlighting certain things, but they're usually in addition to, rather than instead of, the original release of findings.
NASA responded to a similar controversy in 2006 by explicitly saying that NASA scientists can talk to the media about scientific research or their personal opinions without prior approval, as long as they're disseminating unclassified information and are clear that they're speaking in a personal capacity (http://www.washingtonpost.com/wp-dyn/content/article/2006/03...).
Unions in Canada are uniformly hostile to the Canadian Conservative government (although, interestingly, their membership largely is not, especially in the industrial unions). That is not to say that the union's point of view is not valid. But this is certainly not a Bush-era-esque case of the scientific community standing up to government hostility to science.