I've already made a video about that glitch:
http://steamproxy-script.pipiskins.com/sharedfiles/filedetails/?id=179955483

That is so cool. I think it's time for me to go back in so I can check it out.

We're geniuses! It was a combined effort.

wookie you are genius: it's really working if you quick load F8 befor opening pc! I've already uploaded a vid and a guide to the Dr. Kavanagh PC XPs Glitch (Missing Link) - just enjoy:
http://steamproxy-script.pipiskins.com/sharedfiles/filedetails/?id=179813737

ok)) gonna try it again)

http://www.youtube.com/watch?v=oABdOdwDN94&list=PLLRCspHwPYgIZPdcog3wtCEkHxD1O9k17

That looks like it might be a console hack. Something that may not have been available on the PC. Or, like you said, it was a Beta hack that later got removed.

Another possability is: I noticed he was opening the load menu before the computer he was hacking actually opened. In other words, Quick Save before the hack. Complete the hack hit the Quick Load key the moment you see your bonus, but before it actually starts tallying the bonus and opens the computer files.

That might be worth trying.

))) on Jensen's pc in 3rd Detroit part I've just managed to get on that 2nd attempt as in this vid even 1000 xp instead of usual 500
http://steamproxy-script.pipiskins.com/sharedfiles/filedetails/?id=170475573
at first I thought there's a famous glitch (you know: you save and load before hacking Jensen's pc and get more and more xp - infinitely)) I tried it again - no success: in my edition is that glitch updated, I suppose all the spoilers from youtube are based on the beta leak version
like that: http://www.youtube.com/watch?v=oABdOdwDN94&list=PLLRCspHwPYgIZPdcog3wtCEkHxD1O9k17

I'll be damn. I never noticed that before! I might have to look out for that the next time I play.

yes you're right) but here i mean that direct capture of the security node not always brings all the bonuses. at the beginnig of the game - it's true and easier, but from 1st part of hengsha i founded a lot of locks in different levels which hacking brings more when you capture security node plus data stores and sometimes - spam nodes) but it works only on the 1st attempt.

I like it when I can get them that easy. But, when they get more complex it gets more difficult. Also, on computers with level 3 and higher, the timer gets a lot faster.
At least, that has been my experiance.