Nothing has changed, people still go to bars on Folsom, not off Market. There are still seedy ass looking people hanging around at night who may or may not jump you while you wait for your MUNI bus that comes every 45 minutes.
Not really, Zendesk has being there since Aug 2011 and the block between 6th and 5th is way better. I walk this block everyday and it changed, for good.
Twitter is between 9th and 10th street, so comparing the changes between 5th/6th isn't really describing what's happening around Twitter. The whole article talks about some transformation that hasn't happened yet. 5th/6th isn't really that safe anyways. Maybe during the day and when work gets out around 5-6PM, but I wouldn't recommend staying out there after 8PM
I agree, what I actually meant is that 5th/6th got better over the past 1.5 years.