Because Internet dating has been a part of his generational experience, he is more comfortable with it as a normal mode of communication and meeting people, and is generally more open to the process and experience.
Therefore, when he connects and makes plans online, he likely follows through, sometimes sooner, sometimes later.
He is typically at the age of sexual discovery and imagines that older women are not only more experienced and enticing, but more available as well.
However, starting a relationship with a lie—now matter how “harmless” it may seem to him—takes away from the woman’s ability to use her own discretion and decision-making power and therefore erodes trust.
When she inevitably finds out, she typically finds the age difference and the lie far more jarring than he had anticipated.
After all, he has experienced love before, which is why he’s so heartbroken now, and why you encountered him online.
However, it is equally possible for him to remain non-committal when he is still hung up on someone else, so proceed with caution.