Ignoring the title, let's work with the conditionals for a moment and break them down:


"at least one BFL customer" - Condition Met
"with a bitcointalk.org forum account established prior to the bet's opening date" - Condition Met
"shall post detailed and credible photos of the device on the forum" - Condition Not Met --- Did Luke take the pictures and post them or did Josh? To that end, which forum is this condition referring to? How much detail is "enough" detail? Does the "device" have to be of consumer quality [not a test board, but one that could be shipped to a customer]?
"including photos of it operating, and report its hashrate." - Condition Met
"This customer cannot be a BFL employee." - Condition Met



"device must achieve at least 75% of its advertised hashrate" - Condition Met


Too much ambiguity, information credibility, and a problem meeting part of the conditions leads me to believe the outcome of the bet is: True -- BFL has not shipped before April 1st, 2013