Agreed, 90 days of reliability is not impressive. But JDP also has a predicted reliability rating based on trending 3 years of data:
http://www.jdpower.com/autos/Porsche/Boxster/2007/Convertible/ratings
Based on this data, JDP gives the Boxster 5 stars for predicted reliability.
Consumer Reports long term data also gives the Boxster a "Better than Average" rating for dependability.
If the Boxsters are as brittle as some have characterized them lately, I wish someone would point to a long-term study that proves it.
As
W. Edwards Deming said - "In God we trust; all others bring data."