as GoldenKnight said, not all of them are less than 508. that said, yes. for LC pokemon that don't need all 508, you have one IV from flawless per 4 EVs not usedSince the Little Cup EV spreads don't total up to 510 (or 508, for that matter), does this mean that there is some leeway as to IVs? To clarify, could you end up with the same stats of a 31/31/31/31/31/31 IV spread if you had less-than-perfect IVs but invested more EVs in the stats that had imperfect IVs since there are "leftover" EVs from the spreads?
additionally, stat's that require no EVs have some leeway as well. the total below flawless you can be is equaly to (80-x)/4, where x=EVs needed for the next point in that stat
for example, say you're EVing a sweeper, and its Def needs 36 EVs for the next point:
your Def IV must be 20 or higher. anything lower will require EVs to clear up the deficiency