theres nothing wrong with the loading to be honest, whats the betting you pause it to go to the loo or to grab a drink, thats breaking it up.
So is the autosave feature in D3/Q4(yes i know hl2 has one aswell)
All games are going to have breaks etc inbetween, because they are games, not real life. HL2s loading sequences are not exactly v long, they are easy enough to put up with.
I hope the people who class this as a fault dont sit and play the games for hours on end without resting. That would do yourself a lot of harm, eye-strain, RSI etc. Stiffening muscles etc!