In contrast i have quite a powerful computer. i7-930 Hyperthreaded and overclocked with 24gb’s of ram.
For my test scenario i start with a cube and apply a subdivision of 14. This produces a sphere of a bit over 6.2 million faces. If i then go into sculpting mode i see the following.
I have tested my version and the latest build of of blender both 2.71 and have noticed that cpu usage goes to 100% during sculpting and as such there is lag. (Even when using simple meshes like suzanne)
In contrast if i run version 2.70a with the same subdivided cube my cpu usage never goes above 20% and as such there is no lag
–I have just tried the legacy build of blender 2.71 vc9 and i am getting the same performance as 2.70a!! So i guess my solution is to use that version about and hope they never discontinue it… (Unlikely i know)
Note i am only using 64-bit builds