actually; no it isn't true.
If you get online and customize a PC laptop to even come close to the specs on the powerbook (good luck finding a 17" screen with millions of colors) and upgrading to an 80GB hdd, 128mb video card, and 1.5 gb of memory...etc, you are actually looking at almost identical prices...and with a friends/family discount or an education discount through apple, you can get one cheaper than most of the top of the line PC laptops (which still don't come close to being as powerful as the Powerbook is...this laptop kills my desktop system (both my custom built one and my top of the line Dell system) in every area of design, functionality, speed and ease of use.
Iam sorry, but really what a nonsens, i understand you're happy with your Mac but you're not backing anything up here.
I have a dual G5 mac and my pc (which costed not even half) kicks the mac ass in every benchmark, every tool, simply everything and not by an inch, by miles. Iam so tired of all the Mac fans just saying Mac is faster. All i have ever seen where a Mac was faster was on the G5 introduction with MacBenchmarks, provided, created and distributed by a Mac. Inmidiatelly after that the 'big' sites put them up against simular pc's and proved them totally wrong with every significant test out there.
Like i said in the other Mac vs Pc topic. I can't make an honoust comparison between my pc and mac (dual 3,4 GHZ, 2GB 4200DDR, Radeon X800 Pro 256MB, AX800 PRO/TD vs an Apple dual 1.8 Ghz, 512Mb DDR400, GeForce FX 5200 Ultra). Altough the Mac speeds don't stretch very far anymore (dual 2,5 Ghz, 512kb cache) and for a pc i can still go for a 4x3600, 2048kb cache) and still i would save money buying the pc. I can even throw in extra raid scsi disks 15.000rpm vs Apple 7200rpm. And with some good watercooling & hsf combi i can even tweak the fsb, cpuclock, memspeed, videocard..
Mac simply can't hold the devopment speed of the pc.
Let's make that ibook comparision with a pc laptop for example a simple customer Acer Aspire 1714SMI+, so not even a custom one (still cheaper than ibooks):
$2,799.00
17-inch TFT Display (equall but apple has a deadpixel problem)
1.5GHz PowerPC G4 (WAY slower, check EVERY benchmark)
512K L2 cache (slower)
512MB DDR333 SDRAM (less, and slower)
80GB Ultra ATA/100 (less space, equall speed)
ATI Mobility Radeon 9700 (64MB DDR) (slower, less videoram)
Gigabit Ethernet (faster, not wireless though)
FireWire 400 & 800 (equall)
AirPort Extreme built-in (equall)
+ A few expension options, at Mac prices (mostly aged pc models with a mac tab)
$ 2177,49
17" SXGA TFT Active Matrix (equall but apple has a deadpixel problem)
Processor Speed p4 3.4GHz CPU (way faster)
512K - 1024 L2 cache (faster)
3072MB DDR (More)
Hard Drive 120GB (more space, equall speed)
Video Chipset nVidia GeForce FX Go5700 128MB (faster, more videoram)
Wireless LAN Built in Wireless LAN 802.11g 54Mbps (wireless, but slower)
+ Optical Drive DVD-+RW (not included in Mac price?)
+ Extra battery
+ Optical Logitech Mouse
+ 1000 of expansion options at independend prices.
+ Free 2 years Pick up & return support.
+ $500+ and a lot of extra time left while the apple starts rendering.
so that's just a comparison between a random picked 17" laptop.
And you goodluck with finding support for a new processor, mainboard, 256Mb videocard, hsf, etc and apple support in general.
Do a little search on the big sites like tweakers, anandtech, tomshardware, slashdot and so on and so on. Before you start shouting nothing beat an apple. And otherwise show us benchmarks. I can send you a MAX or Ae render and see which one of is done faster, iam betting my pc has it done 5 times as fast as your G4 ibook and iam not kidding, cause like said i compared those things with the dualG5.
Btw love your work