I compared Cruz's 2008 to other great AAA seasons by guys aged 26-28 to test the likelihood of him having a decent MLB career:

http://www.rangers.scottlucas.com/archives/2008/07/can_nelson_cruz.html

Farewell, farewell! but this I tell
To thee, thou Wedding-Guest!
He prayeth well, who loveth well
Both man and bird and beast.

He prayeth best, who loveth best
All things both great and small;
For the dear God who loveth us,
He made and loveth all."

The Mariner, whose eye is bright,
Whose beard with age is hoar,
Is gone; and now the Wedding-Guest
Turned from the bridegroom's door.

He went like one that hath been stunned,
And is of sense forlorn:
A sadder and a wiser man
He rose the morrow morn.