Not so much a problem with the newer models as I understand it.
As for most advanced technology. It's debatable.
The Bluray yes but the Cell is hyped far more than it is truly worth. Yes the PS3 Cell has 7 cores* but 6 of them are vector processors (SPE's) that aren't as generally useful as a normal core, added to this the PPE is missing Altivec support so puts a lot of extra burden on the SPE's. Comparatively the 360 Xenon has 3 full PPC cores with Altivec support (so it has some vector processing capability but not as much as the PS3 granted). Also the Xenos GPU (based on the ATI R600 line) in the 360 is more advanced than the RSX (which is based on the Nvidia 7 line) for the PS3**. Naturally both are years behind the current PC graphics card lines (the Nvidia 8 series stream based chips were quite a departure from the old pipeline based cards and walks all over the old ones in terms of raw power, of course the 9 series takes this further).
I'd say the PS3 has the most interesting technology (I'd rather play with the Cell than with the Xenon) but don't believe it produces more power outright.
*the normal Cell has 9 but one SPE is dedicated to the PS3 OS and the other is outright disabled to improve yield.
**interestingly the 360 came out with a card that was ahead of the PC market when it was released, the PS3 came out with a card that was at least a year behind the PC market at release.