Could EPA Range approximations for 90D be low to help sell more P90D ?

[commasign]

Bumping again now that we have Model S and Model X P100D variants:

Model X 60D vs Model S 60D
200 miles vs 218 miles (91.7%)

Model X 70D (listed for a while but never built) vs Model S 70D
220 miles vs 240 miles (91.7%)

Model X 75D vs Model S 75D
237 miles vs 259 miles (91.5%)

Model X 90D vs Model S 90D
257 miles vs 294 miles (87.4%) <<<----------?????????

Model X P90D vs Model S P90D
250 miles vs 270 miles (92.6%)<<<----------?????????

Model X P100D vs Model S P100D
289 miles vs 315 miles (91.7%)

Tesla seems to be sticking to a 91.5%-91.7% relative range X vs S for most of their lineup. The P90D is about 1% better perhaps due to the active spoiler, or perhaps to sell more P90D as postulated in this thread. Apparently the P100D does not get this benefit. No explanation why the X 90D is 4+% lower than everything else.