I'm going to jump in on the defence of SAHM's and full time working Mum's here!
As a full time working Mum (and have been since my children were just a couple of months old) you do still manage to get all of your daily chores done (i.e feed, shopping, tidying etc)
My reason personally is that I pay someone else to drop my kids off and pick them up (breakfast and after school club) This of course isn't the case if you are a SAHM, you are doing this job yourself, therefore you already have lost time out of your day.
Being a SAHM you are more likely to do jobs that us full time working Mummies don't always get round to - be honest now full time mummies! We all have that drawer or cupboard that isn't cleaned.
Yes I am sure some SAHM's watch a bit of TV at home, as do I during my lunch break at work!!
I think SAHM's get a bit of a raw deal if I am honest. I find going to work quite a bit less stressful than looking after my kids during holidays (but obviously I prefer my kids to my colleagues!)
I think there is a lot to be said for appreciating how difficult it is for both SAHM's and full time working Mums.
None of us get an easy ride, but we do what we can and we make a damn good job of it 
We should all pat ourselves on the back once in a while.