I'm seeing almost a 5-times regression in the time to startup the JBDS UI from 2.1 to 3.0:

About 15 seconds to start:
Version: 2.1.1.GA
Build id: v200911051555R
Build date: 200911051731

About 70 seconds to start:
Version: 3.0.0.CR1
Build id: v201001060655N
Build date: 201001060704

System information:

processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Duo CPU T7500 @ 2.20GHz
stepping : 11
cpu MHz : 800.000
cache size : 4096 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
apicid : 0
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat
pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc ida pni
monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm
bogomips : 4389.30