Actually, there is no proof that there is a correlation between bloat and how fast or slow eats. It's purely speculation. Eating fast the doesn't take in any more or less air then eating slow.
Your advice is dangerous, go away
Recheck your research, Purdue has done the research that shows the speed of eating makes a difference. Raised bowls actually increase the chance of a bloat.....
http://crittersitextra.com/pettips/NEW_Purdue_Bloat_Study.pdf
http://www.mhwc.org/weimaraners/bloat.html