Like everyone has said, what the captain is doing is technique and what he prefers or feels comfortable. If the runway is long, cool temps, etc. there really is no need to spool up the TRs, granted I wasn't there so I don't know the real situation or rational behind it. Even on a warm day, you really don't have to spool them up, but if someone chooses to do so, are they wrong, not at all. Even if you have a quick turn, if you take a look at the Quick Turn-Around Charts in CFM 1, in many cases all the brakes need are about 20 minutes or so, and many times a "quick turn" takes just about that long.
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