I would agree with Mr. Nenni 100% on that. I checked with several sources and found that it was highly unlikely that TSMC shut down 28-nm production. I reported this in the EE Times Forum, also in March:
The point of mentioning this rumor in the story was to support the statement that TSMC has been dogged by rumors about it's 28-nm process.
Mr. Nenni of SemiWiki has been saying since March that the 28nm rumors about TSMC shutting down production were false, http://www.semiwiki.com/forum/content/1091-tsmc-absolutely-did-not-halt-28nm-production.html
As we unveil EE Times’ 2015 Silicon 60 list, journalist & Silicon 60 researcher Peter Clarke hosts a conversation on startups in the electronics industry. Panelists Dan Armbrust (investment firm Silicon Catalyst), Andrew Kau (venture capital firm Walden International), and Stan Boland (successful serial entrepreneur, former CEO of Neul, Icera) join in the live debate.