It means that currently the difficulty is low to have 10 minutes gap. Hence the difficulty will jump up soon at the next update. Prediction is around 12% Up.

wow 13% increase wont it be absolutely unprofitable to mine btc? im getting a bit worried

cheap ghash almost always means ponzi scheme which eventually will fail just saying

It has nothing to do with changing difficulty. The difficulty changes every 2016 blocks.

It probably has little to do with changing hash power since adding blocks at that rate implies a 1700% increase, which is extremely unlikely.

It is just luck. Sometimes in takes a hour to add a block and sometimes it takes a few seconds.

really this is very amazing. Sometimes the luck smiles for us.
Congratulations to all who had the pleasure to enjoy this "luck"

Last 5 blocks have been found in 5 minutes...

First: https://www.blocktrail.com/BTC/block/000000000000000010d0ce80d50d90b1439b617534c49f221888a2d4e626d596

Last: https://www.blocktrail.com/BTC/block/000000000000000017dfe3f5ebf13fdcf41b255ad0c3da4fc880745a221bf959

https://en.wikipedia.org/wiki/Poisson_distribution

Only the long-term distribution is important (and that's what Difficulty is for), the short term is too random to pay attention to.
The probability of 7 or more blocks in 12 minutes (1.2 expected, when difficulty matches actual hashpower; in reality, this expected figure is higher) is about 1 in 4,000. In other words, this happens by random chance more often than once a month (on average), when difficulty is holding steady. Not too surprising.

Sounds quite lucky. We'll see if this becomes an ongoing trend.

Can not become a trend because of difficulty adjustment