I highly doubt this, since each share is 'equivalent to 1MH/s'.
3 BTC will buy 420 shares of VM and 1 share of ASICMINER. ASICMINER is giving about .035btc/week, and the VM would give you 420 * .00003223 * .8 (20% difficulty increase) * 7 days = 0.0758 BTC/week.