Correct. Easy way to tell. (1) If the monitor is $150, it's not IPS. (2) The viewing angle should be 176-178 degrees for IPS. If 170/160 or less, it's definitely TN.
See below links: http://www.behardware.com/articles/629-1/24-inches-the-dell-2407wfp-vs-the-samsung-244t.html http://www.computerforum.com/151428-dell-vs-samsung.html http://www.tomshardware.com/forum/324891-31-samsung-dell-120hz-monitor
You can get the Dell 24" U2412M which is an IPS panel for $299 at their Dell Outlet site. Retail is: 369.00
the new DELL ultrathin monitors look pretty sweet. Only seen TN versions so far though. http://accessories.dell.com/sna/sna.aspx?c=ca&cs=cadhs1&l=en&s=dhs&~topic=ultrathin-monitor
The thin panel design would be PERFECT for hanging on the wall. Unfortunately, DELL blew it by only allowing for the cables to be plugged in from the back of the monitor. Dumb, Dumb, Dumb...