In Races of Faerun, under Feat and Ability Score Increases (p. 7) it indicates that you do not get ability score increases for monster Hit Dice alone.
This seems to contradict Savage Species, under Level-Dependent Benefits (p. 15).
There is no mention of skipping monster Hit Dice in Savage Species that I could find. Negating the stat increases makes sense if you presume that these bonuses were already included in the stat block found in the Monster Manual. But... were they? Or do PC monsters gain the stat bonuses whereas "normal" monsters would not?
Do not add ability score increases derived from the character's racial Hit Dice alone. In effect, you should skip a number of Hit Dice equal to the racial Hit Dice before assigning a character ability score increases.
This seems to contradict Savage Species, under Level-Dependent Benefits (p. 15).
...treat the base creature's Hit Dice as its character level and find that value on Table 2-5: Experience and Level-Dependent Benefits, below. This table shows any ability score increases or additional feats that will result from adding class levels to your monster's Hit Dice.
There is no mention of skipping monster Hit Dice in Savage Species that I could find. Negating the stat increases makes sense if you presume that these bonuses were already included in the stat block found in the Monster Manual. But... were they? Or do PC monsters gain the stat bonuses whereas "normal" monsters would not?