Look, Rein has been a fucking marketroid douchebag since Unreal. Everybody in the industry who has a clue has known that for a long time now. That said, Tim Sweeney is an absolute fucking genius who almost single-handedly drove PC gaming to the level it is today, graphics-wise. (Like it or not, if you do not admit that the Unreal Engine isn't some of the most elegant and efficient programming out there, you are either lying, an iD fanboy, or you don't know your stuff. There's a reason it is, by far, the most licensed engine on the market today, and why producing quality work in UDK gets people jobs.)
Anyway, I'll be brutally honest: I WOULD have sided with Harris, except that he came off as being just as petty as Rein in his reply. Sorry, I do not believe that, if you were actually given a choice, a person would really honestly prefer a job with an indie studio making a product they believe in and yet make no money over the chance to work at a AAA studio making a product they believe in (and I bet the people who worked on UT III, Crysis, World of Warcraft, etc. etc. believed in what they were working on) and make hideously large bags of money, just because 'you can communicate with individuals'.
He would've been so much more believable if he had said something along the lines of "well, Mr. Rein, not every studio can be a major player. As an indie developer, I think it pays dividends to cultivate what advantages we have, and a closer relationship with our customers definitely falls into that category."
But no, he had to start waving his cock about how much better it is to be an indie dev, which a) nobody believes, and b) makes him look just as arrogant as that prick Rein.