Forty per cent of all face-to-face Visa card transactions in Australia are now made using the group's contactless system, payWave.Visa reported yesterday that consumers made 40 million payWave transactions in January, compared with 28 million in September last year.Earlier this month Westpac reported that 54 per cent of its customers' debit transactions were contactlessAfter a slow start, use of contactless payment technology started growing in 2012, when Coles and Woolworths got behind it.Visa group country manager for Australia, New Zealand and the South Pacific, Stephen Karpin, said in a media release that other retailers were adopting the technology.Westfield Sydney's food courts have moved to 75 per cent contactless payment terminals over the past six months.Visa's research found that consumers like the speed of the transaction.