Writing Time: Snatches or Block?

I was reading another writer's blog yesterday and I was disheartened to read their thoughts that you can't get quality writing done in snatches of time.  Quality writing is achieved when you have a minimum two hour block of time per day to write.

Now, don't get me wrong, I'm not dissing what they said or their thoughts on the subject, but that hasn't been my experience at all.  I can't recall ever having two hours per day of writing time.  Ever.  I have eight children and a life that intrudes upon my writing all the time.  All I have been able to do is write in snatches of time.

I have had this argument with writers before, that quality writing deserves quality time and if you're only writing in snatches then it's a hobby not a business.  I've heard those arguments.  And I argue against them because my perspective and my experience has been different.  I have published nine books since 2004 and I've done it only writing in snatches of time with some hours on weekends when my husband or older children have taken the younger ones for a time so I could write.  But that doesn't happen every day.  And yet I still look upon my writing as something I love, a way for me to share my talent, and yes, to earn money.

I'm not negating anyone's experience because I believe writing is personal.  Everyone's journey is different, everyone's way of doing things is different. But we all have one common goal---to share our stories with readers who will appreciate them.  If my situation requires that I prepare my scenes and dialogue while I'm changing messy diapers and playing Barbies and then writing as fast as I can while Barney is on, then so be it.  If you need two hours per day to write your book, then that's great, too.  But is it fair to say that someone's writing isn't quality unless they have written it in a block of time vs. snatches of time?

I don't think so.  What do you think?