Conveniently, Stack Exchange has a Q/A site for usability: http://ux.stackexchange.com/
You can certainly ask questions there about how important it would be for tab show a tab vs redirect.
From their help on what you can ask:
We prefer questions that elicit definitive answers or solutions rather than prolonged discussions. Remember, this a Q&A site, not a discussion board.
More context yields better answers. Fill your question with details such as:
- Description of the users' experience levels and goals
- Mockups, screenshots, or photos of existing designs
- Software platform, if applicable (Is it an Android app? A web form? A kiosk with a 20"×20" touch screen?)
If you're familiar with other Stack Exchange sites, questions on UX tend to be a little more subjective than usual. That's okay, as long as the question follows the guidelines outlined in Good Subjective, Bad Subjective.