Not sure if this is a spoiler, but here's a warning anyway.
Something tells me that Abernathy farm was going to be the first place the sole survivor was meant to visit, but was changed at the last moment to Concord to see PressedHam Mc'Gravy.
I mentioned in an earlier thread how the transition from pre-war walks in the park and salisbury steaks to post-war wasteland survival is without question. To recap on that you help some random people and they hand you bottle caps. You as the character would see this as garbage, but take it without question and say thanks.
However, at the Abernathy farm when talking to everyone there it is all as the character without knowledge of how this world works. (Mind you I am paraphrasing this, but this is basically what is said.)
Example 1:
"Help out and we will pay you 10 caps for each crop."
'Caps? Like bottle caps? Garbage?'
"It's money silly."
'What happened to dollars and cents?'
Example 2:
"...And our trusty brahman."
'Whats a brahman?'
"Umm, the big two headed thing with utters, patchy hair and smells. That's a brahman."
There are a few more examples there, but I will leave them for you to go there and talk to them yourself. There is some dialogue asking about raiders, trading and tatos too. All of this makes me think that Abernathy farms was meant to be the first place you were meant to visit, but Bethesda probably couldn't link PressedHam Mc'Gravy to it so they just have you go see him straight away.
My solution.
"Its been rough times ever since the minutemen broke up."
'Minutemen? Did I travel backwards in time?'
"I heard there was still a small group that were setting up over in Concord. They may be your best hope at finding your boy."
'Thanks Mr Abernathy. You and your family give me hope for this world.'