Windows 7 crawls on my personal laptop and office desktop. Both have i5 processors and 4 GB of RAM. It takes several minutes to cold-boot or wake up from hibernation and load Chrome. Minutes of non-stop HD reading.
OTOH Linux Mint boots up faster and is way more responsive. It's actually faster to cold boot Mint than to wake up from hibernation on Windows.
It's anecdotal evidence, but for me Linux is very superior in this aspect.