Absolutely. I've said that several times here. Every time we attack a fellow conservative, we're doing the work of the Obama 2012 campaign. Some of the rants here look like they could have come from DUmmies instead of FReepers. I cringe every time I see someone posting an article from some leftie blog that shoots more arrows at Republicans. So I agree that "Here's why my candidate is better" is far superior to "Here's why your candidate sucks."
There are differences in style and in philosophy of the candidates. I will say there are even differences in character. It does make for a difficult situation for verbal exchange of ideas/intents to avoid ‘plowing up the field to expose/rid the weeds’. The one feature that bothered me in all these debates has been the candidates attacking each other on a personal basis on different positions when the discussion could have/should have been held on the matter devoid of who was/had been espousing what. Such behavior does not increase stature in my thoughts and opinion. That sometimes candidates appeared to be trying to stare down the speaking candidate was also a turn-off. I’m sure some rancor was stirred by the moderators but the candidates should have been wise enough to dodge such baiting.