V2.6 FINALLY has integrated mobile responsiveness!
I had worried about converting my 3 workhorses into WP and losing the immense SEO juice that I gathered over the past 3 years, but I did a redesign of the site in 960pxW instead of 860pxW, and to my extreme joy, it is mobile responsive now (which means it fits itself to all devices)
If you’re using Yahoo, its going to take a whole lotta cutting, copying and pasting, but it will be worth it in the long run to optimize your site !