I just got thinking about the different level of performances given by some orchestras with their own conductors and guests. The most obvious discrepancy I've heard recently is Michael Tilson Thomas in front of the LSO (for whom he was Chief a decade ago)and his own SFSO. In the former case things were relatively flabby and pedestrian, whereas the SFSO performance was quite electric. Now I know it's not the LSO that's iffy - their performances under their own chief conductor (Colin Davis) are wonderfully taught and exciting - and similarly under Pappano. I've also not been entirely convinced by them under Janssons, whereas his concert with his own Pittsburg orchestra was excellent. I guess the surprise was why was MTT so much better with the SFSO? The other case was some really rather poor performances by the Concertgebouw under a few guest conductors. I've also seen quite a few disappointing concerts from the LPO under a variety of batons (their performance with Mutter last month was a complete joke - primarily her fault). So is the current jet-setting mix'n'match of conductors and orchestras a good thing - compared to the old-style personal fiefdoms of e.g. Toscanini/NYPO, Karajan/BPO, Beecham/RPO. With such a relationship the orchestra and conductor get to know each other very well, get an agreed sound and really work as a team. Recent triumphs of this approach are Janssons/Oslo (and again at Pittsburg), Vanska at Lahti and BBCScottishSO (I'm looking forward to seeing how he's doing at Minnesota). The classic counter-example though is Vienna, who only ever have guest conductors. Another (at lower level) is the BBCSO, who clearly don't hit it off with their own conductor (Slatkin), but play pretty well for e.g. John Adams and Donald Runnicles(Andrew Davis is not really a guest as he's their immediate past Chief). I guess it's all a matter of how well the orchestra and conductor hit it off - and sometimes you're just unlucky?