So I have owned my 2011MBP (15", 2.2GHz) for about a month now, and while it isn't slow, it doesn't feel as fast as my 3 year old C2D (E6750) based system. On my Windows machine, I can run several virtual machines, for months, without even noticing any impact on other applications such as Adobe CS3, etc. This system only has 4GB of memory, and an older 750GB HD. If I try running just 1 virtual machine (be it XP or Windows 7), it makes the laptop almost useless, while the VM itself isn't running that fast either. I have tweaked some of the performance settings in Parallels, but nothing seems to make a difference. I upgraded to 8GB of memory, still no difference. Is this a typical experience?