Most websites work better on my (secondary) 1920x1080 desktop than they do on my 1080x1920 mobile. They always work better than my 1920x1080 mobile with half the screen covered by a touch keyboard.
And I swear my fingers are 100x less precise hitting the mobile touchscreen than my mouse on the desktop.
mobile friendly != mobile sites. Till they borked it Dolphin on Android was good at reflowing pages to readable font sizes without horizontal scrolling, if this encourages 'desktop' sites to format themselves better and/or adaptively I'm for it.