Stutters: all related with texture streaming?

[LoBiSoMeM]

After play with all settings, the only that made MAJOR improvements in fluid gameplay, without micro/major stutters, was texture quality. With textures to "medium", I only lost detailed textures in close range of objects and minor visual degradation, and keep good quality in vehicles, and all stutters gone. Even over London, fast low level flight.

I have 1GB VRAM card.