I measured my APDGT just now - it's 27" exactly. Maybe 0,1-0,2 mm off, but that can be forgiven..
A difference of 1/4 inches (6,35 mm) is huge. It's one thing to get the weight slightly wrong, since it involves lots of different materials with varying density, but I can't imagine the big companies having tolerances of +/- 1/4 inches in length.
Current setup: Head Graphene Speed Pro / M2 Plus @ 53 lbs
Headlight Friday night - Headheavy Saturday morning.