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What have we learned so far in the postseason? (PER Diem: May 7, 2012)

Updated: May 7, 2012, 2:20 PM ET
By John Hollinger | ESPN.com

It was so close to being a really interesting first round. Atlanta, Denver, Dallas, Orlando and Chicago could all easily be tied 2-2 in their first-round series, setting up genuinely meaningful Game 5s over the next three days and a lot of intrigue heading into next week.