To be fair to Dissector, he isn't making an unreasonable point. Whether we like it or not, rightly or wrongly, some people may be reluctant to read too much into that series, particularly the Lord's test. In fact, these fixing allegations go back two years (?); right ? I am sure there are people who look back at the said series with scepticism - the Australian players and fans have admitted as much about the infamous Sydney test, despite it being officially cleared by the ICC. That said, it definitely shouldn't detract from England's magnificent performance in that series. Some of the balls Graeme Swann bowled would have challenged Sourav Ganguly, let alone Imran Farhat.
Now coming to Harbhajan Singh vs Graeme Swann - I rate the latter higher, currently. More than averages and statistics, it is Swann's willingness to toss the ball up to the batsmen that I find impressive. For some reason, Harbhajan Singh hasn't quite shown the inclination to flight the ball, he has become a very defensive bowler. If someone hits a four off his bowling, particularly early on in his spell, you will see a marked change in his tactics. Graeme Swann, on the other hand, doesn't get flustered even if someone hits a four or two off his bowling, he continues to toss the ball up to the batsmen. Having said that, there was some noticeable improvement in Singh's bowling, in the last two series that he played; his performance in South Africa was particularly refreshing.