They really need to get agressive, I have yet to see a windows phone advert on tv - probably saw a handful compared to ipad, iphone, galaxy and htc one m8 adverts. Sure you can offer to incentives to sales men and women, but people being people will always have a bias towards their own preference. You can spot this behavior a mile away from the way the vocal tones and body language changes.
Furthermore MS needs to have reps that make occassional visits to key places i.e Westfields in Stratford city to make sure the stores are giving WP a fair game - I have seen so many "dead" windows phones not set up properly, plugged into faulty charges, turned off and no way to turn it on as the power button is covered by the locking mechanism - All this is used by sales rep to further their egoistic bias.
This is not isolated to windows phones either but surface's as well, I went to try a surface 2 at Currys' in Mile End and it was turned off. I asked the rep why wasn't it turned on - her reply was because these devices are crap and just short out unlike the ipad gleefully . A bit annoyed I walked further down the store and I asked another rep, he came fumbled around, then gave up and asked if i would like to look at other tablets. I asked (again) out of curiosity what the problem was and he said its probably the battery, when I said why not replace it with a working unit and he said it was the only display model in stock..
Maybe it's just me and I just some how automagically trigger the sales rep's confirmation bias where as others may have a better experience lol...