There is a very important distinction with regards to integrity, though. Marco imputes an incentive to appease manufacturers to keep review copies coming; Gruber speculates that they don't want to rile up the eternal "other side" of the Apple vs. the World debate.
The former is an attack on their journalistic integrity, Gruber's much less so - although still an attack, nevertheless.
Gruber knows to temper his rhetoric, being a guy with journalistic sentibilities himself. Marco is just a guy with a blog.
That's true. After all, Gruber is (at least in name) a journalist. Marco's blog is just a place for him to express the opinions/emotions he wears on his sleeve. The only reason anyone pays attention to him is because of the popularity of Instapaper.
The former is an attack on their journalistic integrity, Gruber's much less so - although still an attack, nevertheless.
Gruber knows to temper his rhetoric, being a guy with journalistic sentibilities himself. Marco is just a guy with a blog.