This was LC #99 - english units
Let's look at some in the past, these are only the LC having to do with math quantity equations, not ciphers or other types of logic puzzles:
LC #98 - miles (english)
LC #97 - metric
LC #88 - lb (english)
LC #86 - metric
LC #81 - miles, because the 'explore' map key is in miles (english)
LC #77 - meters (metric)
LC #73 - cubic inches/volume (english)
LC #72 - cubic inches/calories (this LC and #73 were a two-part problem)
LC #69 - feet (english)
LC #65 - inches (english)
LC #60 - "neopian sound units"
LC #46 - metric
LC #35 - metric
LC #34 - metric
LC #33 - metric
LC #28 - metric
LC #24 - metric
LC #23 - english
LC #21 - metric
LC #2 - english
Ten in english units, ten in metric. Looks pretty equally split, although to me it seems that they've been alternating between the two recently, which seems fair.
As far as other aspects of the site: my pet's height is metric, his weight is in lbs. The 'explore' map uses a scale of CM to miles. Item weights are given in lb.
It seems to be a pretty mixed bag. And last time I was overseas, beer was still served in pints, and most food items, even ones that would never see american consumers had both metric and imperial units on the package. If we all went with what was easiest and best for everyone involved, we'd all be speaking Esperanto wouldn't we?
