Does anyone notice drastically lower Xbench scores when running Leopard?

[Quicksilver867]

I ran Xbench on October 3rd (with Tiger 10.4.10 installed) on my 1.2GHz Quicksilver, and it scored a 49.05 (everything except Disk Test). I ran it again on the third of this month, using the exact same test (again, everything except Disk Test) but with Leopard installed, and the machine scored a relatively-lousy 37.33. The hardware hasn't changed a bit since the first test, so is Leopard just significantly less efficient on this machine than Tiger was? Has anyone else noticed this?

 

[Woochifer]

Actually my Xbench scores went up almost across the board running Leopard. Also, it seems that in general the OS is more responsive, and the bootup time is noticeably faster. Seems that Leopard's stability and performance issues vary by model because I notice fewer complaints from white Intel iMac owners than from PPC, MacBook, and aluminum iMac owners

Here's my comparison Xbench scores between Tiger 10.4.10 v. Leopard 10.5.0

TOTAL: 113.91 120.40

CPU Test: 111.5 125.42
Thread Test: 217.12 180.86
Memory Test: 124.02 137.88
Quartz Graphics Test: 141.15 171.07
OpenGL Graphics Test: 193.92 210.66
User Interface Test: 385.19 260.99
Disk Test: 40.04 43.54