Immediately below the download button you see:
"Findings From the Web Design Survey (1.6 MB PDF)"
I don't think 1.6 MB is too huge for us nerdy Slash-dotters with our high speed connections, especially when we've been warned. And I don't think any reader here can justify clicking the link without first knowing what file type it is.
Additional details about the PDF choice:
"Note: This PDF has been tagged for accessibility, however the graphics representing the complex charts do not yet have equivalents. An updated document will be available soon."
Anyway, they have the raw data available as well in multiple formats (with sizes indicated) so you can avoid charts if you want.