Expected % of experience for a quest turn in?

[Quester99]

With the Drama of the Tumpy Tonics quest I would like to get some clarification on what is considered an "acceptable" % of experience for a quest turn in and what would be considered "exploitable".

For example, the bone chip quests in Kaladim and the gnoll fang quests in Qeynos and Halas offer a great amount of experience at the lower levels (it is possible with a few stacks to skip multiple levels, and the bone chip quest is more accessible as bone chips can be purchased in mass from other players).

Today I encountered a quest where with a single turn in I was able to take a character from 8 to half way through 10. This isn't a quest geared to that level of character, but I was able to complete the quest by obtaining the items from other players and having help running around. Should I report that? Is this % of experience in line with classic (it certainly would be in line with the difficulty of the quest were I to obtain the items myself and I doubt the % would nearly as good at the level the quest was designed for). I planned to run the quest agian tonight as a higher level but the down time has squashed those plans.