You are not wrong...I have tested a display set at HN Northpoint branch and experienced some lag as well, its as though the pen is not well calibrated with the display or vice versa...when I asked the young "boyish-looking" Microsoft sales promoter why SP2 never make it to Singapore...he replied that the release date between Surface 2 and Surface Pro 2 cuts in too close, hence the decision not to get the model in?! WTF is he toking about? Then I asked him is SP3 going to replace a normal laptop? He replied confidently with a resounding "yes' w/o a moment of hesitation...then I asked him what does a laptop entails? He told me a a full blown keyboard and a touchpad...but you have to purchase it separately as some customer in the past had feedback to Microsoft that they DO NOT WANT a keyboard for Surface Pro, hence the decision to drop the keyboard to allow the customer to have a freedom of choice whether to spend extra $$$ or not...then I asked him, so is SP3 a laptop replacement in your opinion? He said 'YES' - then why the heck Microsoft did not include it in the first place if it is poised as a laptop replacement?! If what Microsoft past stance on the keyboard is true...it is a direct response to the previous model and NOT the current model - i.e. SP3. Make sense?
Then I asked him is this response coming from Microsoft (Singapore) or you make up for a reason just to patronize me? He smiled at me and didn't answer me...what an awkward moment...I thanked him and told him I would like to try out the newly displayed SP3.
Lesson for the sale promoter - Dun treat customer like an idiot. There is NO STUPID QUESTION, ONLY STUPID ANSWERS! Good to do some homework on the product you are selling. You'll be surprised how much *knowledge* these days customers had in their mind. Think before you answer.