You can go to the Classic pages, then save the bookmark to the Home Screen. This gives you a way to open the Classic pages in one step, instead of two or three.
You could even create an entire folder with links to each of the Classic or Desktop pages you want for supper fast access.
Hold in mind that some of the Desktop pages work very poorly or not at on in Safari (on the iPad). In some cases, like Contacts, the HTML page works better, for all it's awkward ugliness. That is one of the big reasons that Google redirects you to mobile sites. Not that they have one for Contacts, the slackers.