It is not clear if you're asking if the plugin tutorial is compatible with v1.7 or if the plugins you're currently using are. Those are 2 very different questions.
The former is true. There are minor changes to perform in order to avoid using legacy code, though. E.G.: this require_once QA_INCLUDE_DIR.'qa-app-options.php' should be turned into require_once QA_INCLUDE_DIR.'app/options.php' for most requires.
Regarding the latter concern then it depends on each plugin whether it is compatible with v1.5 and v1.7 or not but, in general, those plugins are compatible.