Does Sutured Ghoul count cards exiled by other effects, such as suspended creatures?

Question

As Sutured Ghoul says

As Sutured Ghoul enters the battlefield, exile any number of creature cards from your graveyard.

Sutured Ghoul's power is equal to the total power of the exiled cards and its toughness is equal to their total toughness.

The text says the exiled cards, so does only count on cards that are exiled by himself, or does every exiled creature counts?

The oracle does not mention any reference to this:

22/09/2011 If any of the creature cards you exile has a characteristic-defining ability that defines its power and/or toughness, that ability will apply. For example, if Dungrove Elder is exiled this way, its power and toughness while it’s in exile are equal to the number of Forests you control, and Sutured Ghoul’s power and toughness will change as the number of Forests you control changes. If the characteristic-defining ability can’t be applied (for instance, it relies on a choice made as the card enters the battlefield), then use 0.

22/09/2011 In zones other than the battlefield, Sutured Ghoul’s power and toughness are each 0.

22/09/2011 You can’t have Sutured Ghoul exile itself, even if it’s entering the battlefield from your graveyard.

Answer 1

It only counts cards exiled by the first ability, because they are Linked Abilities.

607. Linked Abilities

607.1. An object may have two abilities printed on it such that one of them causes actions to be taken or objects or players to be affected and the other one directly refers to those actions, objects, or players. If so, these two abilities are linked: the second refers only to actions that were taken or objects or players that were affected by the first, and not by any other ability.

607.2a If an object has an activated or triggered ability printed on it that instructs a player to exile one or more cards and an ability printed on it that refers either to “the exiled cards” or to cards “exiled with [this object],” these abilities are linked. The second ability refers only to cards in the exile zone that were put there as a result of an instruction to exile them in the first ability.

Answer 2

Although the wording on the card might cause some misinterpretation, notice that it says "the exiled cards", instead of something like "your exiled cards" or "all exiled cards". This is because it's referencing the cards exiled with Sutured Ghoul's ability, not all cards in your exile zone.

I believe your confusion is due to the fact that newer cards have better (or maybe more explicit) wording on them. In the case of the Ghoul's ability, as Gendolkari and ikegami pointed out, it is worded as such because it's based on CR 607, quoted in Gendolkari's answer.

Answer 3

If I may hijack this discussion of MTG for a discussion of grammar: the word "exiled" can either be an adjective, or a past participle, which is a form of a verb. As an adjective, it would mean that all cards that have the property of being exiled counts. If it's a past participle, then it's a passive voice construction, with "cards" being the recipient of the action "exile", and the implied subject would be "you". The wording strongly implies the latter interpretation, as the definite article "the" implies a level of specificity, rather than including all cards that have been exiled. The rules further support this interpretation; the phrase "you exile" is now in the active voice, clearly a verb, and in the present tense. If it were "you have exiled", or "that have been exiled", that would support the other interpretation, while "that are exiled" would be ambiguous.

A further clue is that including all exiled cards would be rather OP.