Bigger Advantage: Hosting First or Second Leg?

Beyond the strategic factors revolving around the Away Goal tiebreaker, the advantage of having home field for the first or second leg in an aggregate score series is often debated. Fox Soccer Channel commentator and former MLS player Brian Dunseth takes a look at the theories on CONCACAF.com. With the added issues of significant travel and inconsistency among league schedule windows, the advantage of hosting a particular leg is different in CONCACAF though. What are your thoughts? Should CONCACAF use the model USL-1 model of giving the higher seed the option of which leg to host?