I created a feature on site A and then enabled it on site B, which worked as expected. But when I disabled the feature on site B, the content types created by the feature were not deleted. I've confirmed that in the D6 version, content types created by a feature are subsequently deleted when the feature is disabled (even if you have created content of that type), so I assume this is how it should work in D7.
Add a delete at the end of the URL.
PASSED: [[SimpleTest]]: [MySQL] 40 pass(es). View
FAILED: [[SimpleTest]]: [MySQL] Unable to apply patch features_content_type_disable-1055460-32.patch. Unable to apply patch. See the log in the details link for more information. View