I don't think the 'lists' right now give range indications, if they had (I can see them myself), you'd be cringing a bit more at diddy's numbers.
Jigglypuff bair has awkward start up and hitboxes. Look at the auto cancels and landing lag combinations of Diddy's aerials too. I don't think people realise how nearly all of diddy's aerials act with the benefits of neutral airs (massive hitbox sizes centred towards the body, low landing lag + great auto cancels, long durations, low start up) while having the positive inclinations of bizarre range with them horizontally and vertically and none of the shortcomings other characters have with similar aerials, just going by the move data.
Diddy's down tilt is possibly the single greatest tilt of all Smash-time (can't think of a better dtilt at least). 4 frame start up, combos into itself, safe on shield, outranges Marth* and will be comboing guaranteed into kill moves even close to 200%, and anywhere from where a near ground fair or uair will (so around 110-120%). There's a few dtilts that are kinda similar (Ike and Olis) which are a lot more start up, higher growths and on MUCH less mobile characters, heh.
Diddy's down tilt (Size=4.200000, Z=0.000000, Y=2.250000, X=16.000000)
That's stretching to 20.2 units, for comparison Marth's shieldbreaker (his most ranged move and fortunately centred on his body for easy comparison) has a 1 frame burst at 29.5 units but the rest of the time is 27.5 units. Shieldbreaker is about 40%+ longer in range than the rest of Marth's moveset.