One of the things I love the most about web-reading is the ease of nonlinear reading. According to Nielson, websites should use about half the word count online as in other contexts. Fortunately, most websites seem to follow this general rule - or, the information is broken into smaller sections. Information in this format is easier to skim and quickly read. Additionally, most websites incorporate bolding and easy to read text choices. While I am not always a nonlinear reader, I find that is most convenient.
I usually use nonlinear and linear reading in a combined fashion. Usually, while I am online, I am researching specific information. Before I truly read the text, I skim to find out if the website actually has the information I need. If I find this information, I will use a more focused linear method. I think this is a practice that many people enlist. It would be difficult to use only linear or only nonlinear reading for everyday online use.