It's been a while ago vs It was a while ago

Some examples from the web:

• It's been a while ago.
• But it's a while ago there was any activity here.
• It's a while ago now, but I saw my husband do it.
• It's a pity that I lost it a while ago.
• Pouring a while ago, but it's stopped.
• It's difficult for me to speak like you at this moment as we've just met a while ago...
• It's okay. I saw Mark a little while ago.
• Look, a while ago, we buy this couples weekend ski trip, and it's next month.
• A little while ago you came to me for advice about turning pro. I know it's about your knee.
• We found out a while ago that it's best not to upset them.
• A short while ago, I sat amid the ashes.
• - We changed these a while ago.
• Appointments finished a while ago, mate.
• Stefan burned his journals a while ago.
• Someone started following me a while ago.
• If you're looking for a correspondence across the way, I would say it's Miss Torso's outfit that I just showed you a short while ago.
• Yes, it is. It's our work - that was a while ago, and it still is my favorite project - of teleconferencing.
• It's that horse that I saw a while ago.
• It's a video I saw on an underground website a while ago.
• He went into convulsions a while ago.

Some examples from the web:

• It was a while ago, and I treat so many patients.
• I didn't put it down 'cause it was a while ago.
• It was a while ago, I think.
• Whatever happened here, it was a while ago.
• I know it was a while ago.
• It was a while ago, Ducky.
• It was a while ago, dude.
• It was a while ago that my father had me sign.
• It was a while ago, but Mr Hargreaves took his own life.
• It was a while ago, but I'm sorry for the way I spoke to you at our last meeting.
• It was a while ago, so...
• It was a while ago... but it was a big thing at the time.
• It was a while ago, and honestly until the worst actually happened, I wouldn't listen to anybody tell me otherwise.
• And it was a while ago before you got here.
• I know it was a while ago, but we knew 'em.
• I thought so, but it was a while ago.
• I don't know; it was a while ago.
• I know it was a while ago, but is there anything in particular you recall about that time that Avery's files were hacked?
• It was a while ago. I've cut my hair since, and we were smashed.