https://askubuntu.com/questions/172532/why-is-ubuntu-more-laggy-than-windows-7-home-premium-on-netbook

Above, if you would have read correctly, AU users try to clarify about the details that led them to ask it. Down-votes due to non-response from OP may be obvious.

In other questions too, you may notice that there was no response from OP. If OP himself is not interested in providing more info to make it a better QA format, then it may be a obvious reason to downvote it.