Today's Tech: Twitter raises share price by 25% and fresh iPhone 6 sapphire display rumours abound

Workers at Google have taken to the Internet to bite the hand that feeds them, anonymously posting a barrage of complaints about overqualified staff and “constant professional boredom.” Google’s enviable employee benefits – which include a gym, swimming pool and free onsite haircuts – mean that most would view the Internet giant as the ultimate employer. However, accusations of Google deliberately orchestrating a talent drain in California and the abundance of highly-qualified staff stuck in menial roles would suggest that perhaps all the perks are more honey traps than benefits.

Meanwhile, Twitter has raised its share price target by 25 per cent ahead of its debut on the New York Stock Exchange (NYSE) on Thursday. 70 million shares are to be sold by Twitter, which adds up to around 13 per cent of the company. The cash injection from the sales should raise up to $2 billion (£1.25 billion) for the global micro-blogging site. The news comes after a few days of analysts scratching their heads over the conservative initial share price valuation. It’s thought that the initial low price was an attempt to avoid a crash in the share price value that Facebook suffered after its own initial public offering (IPO).

Over at Apple, the dust has finally been blown off the cogs of the iPhone 6 rumour mill, with whispers that the Cupertino-based company’s latest smartphone will dazzle with a sapphire display. The news comes after Apple reportedly signed a $578 million (£360 million) deal to open a factory in Arizona alongside GT Advanced Technologies, an American company that specialises in growing the crystals. The same gems are currently used in the iPhone 5S’ fingerprint sensor, so it seems likely that Apple will pick up the super-resilient technology again to become a staple for future products.

Following the catastrophe of the phone hacking scandal, the director of the NSA could soon lose power of Cyber Command, according to a former high-ranking administration official. The US military unit in charge of cyber defence and warfare is currently headed up by Keith Alexander, a four star general who is also top dog at the NSA and is due to step down in spring. The move is seen as an attempt to curb the chance of any potential abuse of power and make oversight of the positions easier, in light of revelations that the President was not fully briefed on all snooping operations, particularly those of friendly foreign powers.