In a way, Uchenna & Joyce making it on the same flight as Rob & Amber out of Puerto Rico did not give them an advantage over Rob & Amber, but equalled the playing field between them. Rob & Amber could have still won if things went right for them once they set foot out of the Miami airport, but of course, what had happened, happened. 
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In reference, to All-Stars,
IMO,
Eric & Danielle deserved to win. They survived being yielded twice, being yanked off a flight and at one point were a full day (or two) behind the leading teams and still managed to pull it off, which was great.
I too, would have loved
Dustin & Kandice
to win. But all 3 deserved it.
They were not smart, not athletic, not calm.
Charla & Mirna deserved to be in the Final 3 as much as any other team. They may not be very athletic, nor calm [in certain situations] (cue *$20 to eat food..I give you* scene
) but I would'nt say they are not smart. They are very good with their airport maneuvers and know how to work it to their advantage.
United Airlines to Honolulu 
Eric and Danielle deserved it most after Dustin and Kandice. It was definitely a very weak all star season. Eric might have competed very well, but Danielle was definitely not a great competitor. I can't agree with you about Charla and Mirna though. They were not smart, they were just sneaky. The only thing that they were good at was finding their way onto better flights. They were also terrible navigators. They payed everyone to get them to locations.
Amazing Race Fan,
I finally have found something I can wholeheartedly agree with you on. I believe that Dustin/Kandice did deserve the win, but their taxi karma from Oakland airport to the Grateful Dead House was their downfall.
In spite of agreeing with you on that, I totally disagree on your characterization of AR11 as "a weak season." WRP and CBS adopted the basic policy of no season winners (except for Uchenna/Joyce), so that eliminated some strong teams form consideration, including certainly Rob/Brennan, Chris/Alex, Chip/Reichen and BJ/Tyler. However, AR11 did feature some dynamite #2 teams from their seasons:
Rob/Amber
Eric/Danielle (substituting for the stronger Jeremy)
Ian/Teri
Other very strong teams were:
Joe/Bill #3
Dustin/Kandice #4
Oswald/Danny #4
Kevin/Drew #4 (or so we thought until we saw them perform in AR11)
Charla/Mirna #6 (eliminated earlier than expected due to aggressive flight selection)
The only weak but highly popular teams were:
John Vito/Jill #5
David/Mary #6
the average ordinal placement was #3.55, halfway between 3rd and 4th.
So let's look at the same statistics for AR18:
Season Winners - none
#2 teams - Jaime/Cara, Ron/Christina, Jet/Cord
#3 team - Margie/Luke
#4 teams - LaKeisha/Jennifer, Herb/Nate
#5 teams - Gary/Mallory, Kent/Vyxsin
#6 team - Mel/Mike
#8 team - Amanda/Kris
#9 team - Zev/Justin
The average ordinal placement is 4.55, exactly one place on average worse than for AR11. My conclusion is that AR11 had much stronger teams than AR18. The desire to allow retribution for the bad things that happened to Amanda/Kris and Zev/Justin pulled the ordinal placement higher by quite a bit. Besides the statistics, I personally believe that AR11 was a strong season.