stuxnet role in stoppage at natanz?

International Atomic Energy Agency (IAEA) report says uranium enrichment halted at Natanz facility in Iran on at least one day this month.  Space Daily website article, "Stuxnet could add to Iran's enrichment problems: experts" suggests it's experts' belief Stuxnet computer worm, which infected the facility's computer system months ago, may be contributing to stoppage?  Mark Fitzpatrick of the International Institute for Strategic Studies cites, on the other hand, chronic technical problems, "the Stuxnet malware appears to have contributed to these problems, but the P-1 centrifuges have intrinsic problems anyway."  Is this an early battle in cyberwarfare or just broken outmoded tech?