Author' Real Name: gets truncated at 15 characters...

This isn't an Omega thing, but a Drupal Core thing. Core truncates usernames automatically so you need to use a theme hook to put it back. Here's what I use

function THEME_preprocess_username(&$vars) {
	//putting back what drupal core messed with
	$vars['name'] = check_plain($vars['name_raw']);
}

thank you! this worked :)

Great solution #1 thanks!

This works for me in D8, I wanted it to be adjustable.

<?php
use Drupal\Component\Utility\Unicode;
function THEME_preprocess_username(&$variables) {
  $account = $variables['account'] ?: new AnonymousUserSession();
  $name = $account
    ->getDisplayName();
  $variables['name_raw'] = $account
    ->getUsername();
  if (mb_strlen($name) > 30) {
    $name = Unicode::truncate($name, 15, FALSE, TRUE);
    $variables['truncated'] = TRUE;
  }
  else {
    $variables['truncated'] = FALSE;
  }
  $variables['name'] = $name;
}