In a modern/human sense, younger males (teens, early 20s) will subscribe to the classical form. Like a lion, they will often be the strongest, most intimidating, hit on all of the women beta makes want, are usually the first to have new sexual experiences and often dominate a set territory in their 'hunt' for new women, such as local nightclub scenes.
While there is something to be said with this definition, that these men know what they want and will get what they want, I fear that this depiction could be sending the wrong message to the readers, especially in the romance and women's fiction genres (I am including here YA romance and more importantly New Adult). Look at the last part of this definition...
Older alpha males, however, will evolve the classical traits of strength, intimidation and dominance beyond the physical by gaining power over men through their very means of living and professional reputation. A powerful business executive, for example, will hire, promote, demote and fire others according to how well they serve his own interests.
These are significant numbers that cannot be ignored. I do understand that throwing the word of "rape" into the mix might seem a bit harsh, but for many of these women, what started as simply a "dominant male" turned into something more sinister.