Nice to see that all the AG methods showed success. I'm particularly glad to see that fly sparging isn't head and shoulders better than other methods, since I am set up to batch sparge or no sparge.
I suppose one would need to see percentages of peoples' methods who entered, to compare to success rates in order to determine if a particular method is superior. And you'd need enough data points for each method to make it statistically significant.
As for extracts, companies are making some really nice products these days (rye, Munich,wheat, even the conventional malt ones have more sophisticated recipes including crystal and dextrin) and I tell new brewers that they can make really good beer with these.