As a rule of thumb yes but......

one or two low DA links to your domain won't hurt but a lot of low DA backlinks sends a signal that you are trying to game the system and your serp will suffer as a result.

Moz found during one of its studies that a backlink from a high domain authority page on a low domain authority website provides more value than a backlink from the opposite.

If you are building backlinks it is best to aim for higher DA sites as they will help more than hurt.

I hope that helps

Love the new graphic, far easier to follow.

It would be nice to click through from the graphic to a breakdown of competitors stats too.

You generally want to have the

tag at the top of the page, above the content paragraph. **Keep it close in relation to the content that is below it also for correlation, **Personally, I'd have it below the banner for that context and keeping a better user experience. Typically, you don't place an

inside the HEADER of the page, but rather the of the site. The Title tag would be in the header.

As long as there is only one H1 tag it doesn't really matter where it is as you are calling it the most important title. Use H2-4 for all the other headings on the page and it will be read that way. As long as the H1 is concise and to the point relating to the page in question above or below makes no difference.

Bruce Clay has a decent view on this and is usually pretty accurate on such things.