Yes, this is a major factor that's often overlooked. I grew up doing child-level hacking in the 80s and then got into real hacking in the 90s as the commercial internet was first starting to blossom. While the reality I inhabit now as a programmer is dominated by the Internet, my habits are more like pre-Internet programmers.
If I were to make an accurate account of all the time and energy that goes into my most successful and well-engineered software products, the majority of the productive time happens "offline" from the Internet and/or even my laptop's screen.
I spend a ton of time turning the abstract parts of the problem over in my head while doing "nothing" (or during the mundane tasks of everyday life), and even when I do get in front of a screen, I still spend a ton of time just sketching out notes in a text editor - basically arguing with myself until I've managed to jot down some good conclusions on how the design of a Thing should be done. Most of those notes get thrown away eventually, as they materialize into resultant source code. I have sometimes spent weeks or months turning an idea over in my head or in these textual debates with myself before a line of code is ever written.
