Thank you! I just sent you a PM.
For reference, if anyone else is interested, I sent these two open access articles for testing:
1. A pretty standard pdf in my field, ~300 kb.
http://msb.embopress.org/content/msb/5/1/326.full.pdf
2. A more complex article, some tables, and lots of small elements (even takes a while to load on my computer), ~10mb.
http://msb.embopress.org/content/6/1/415.full.pdf