Concachafa ends in April; Champions League and Libertadores end in May.
Lets compare apples to apples.
CONCACAF teams lose to Asian and African teams.
Asian competition begins February 2011 and ended 5 November...a month before the CWC
Africans teams end their tournament on 13 November 2011.... half a month before the CWC
The Japanese team qualified on....December 3 just days before the tournament.
Meanwhile, Monterrey was a champion on April 27, 2011, a world away.
As for Barcelona and Santos? Those teams have much less turnover in players than CONCACAF teams.
When Barcelona wins in June, they go shopping for even better plays in August.
Meanwhile, when the CONCACAF team wins in April, all their best players are picked off in August.