There are multiple problems with some of the quickstarts and the README:

example-settings.xml
In the root README.md:
In the section "Configure Maven" (EAP6):

2. Modify the `example-settings.xml` file located in the root of your quickstarts folder.

There is no example-settings.xml in the quickstarts folder. Maybe it should say "`example-settings.xml` file located in the root of the EAP 6 Maven repository"
This problem appears in all examples of maven execution in the README file, such as

mvn jboss-as:deploy -s PATH_TO_QUICKSTARTS/example-settings.xml

Repositories
In the section "Configure Maven" (AS7), it is stated

the community artifacts are available in the Maven central repository so no additional configuration is needed.

That is incorrect, since there are multiple dependencies that are only in jboss public repository and not in central, for example, there's this dependency chain:

\- org.jboss.as:jboss-as-arquillian-container-managed:jar:7.1.1.Final:test
   +- org.jboss.as:jboss-as-arquillian-common:jar:7.1.1.Final:test
      +- org.jboss.as:jboss-as-jmx:jar:7.1.1.Final:test
         +- org.jboss.as:jboss-as-server:jar:7.1.1.Final:test
            +- org.jboss.as:jboss-as-controller:jar:7.1.1.Final:test
               +- org.jboss:staxmapper:jar:1.1.0.Final:test

where staxmapper is not available in central.