I've had my iPad Air since launch and it hasn't crashed once.
I also use safari a lot.
Thats where Im at and its also why feel that this issue may be a physical RAM problem as in the RAM itself is possibly defective. Sounds hokey but if this was truly a widespread, low-mem condition how could so many of us NOT be experiencing it? That doesnt jive at all.
And, why mostly Safari? I play some graphic heavy games and they FLY on my Air. Why dont those crash? You telling me that Real racing 2 or FIFA 14 uses less RAM than a few Safari tabs? Bull sheezit.