ubuntu: update this delay note

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

mk_mmc.sh

@@ -1406,9 +1406,9 @@ function populate_boot {
 	echo "Script Version git: ${GIT_VERSION}"
 	echo "-----------------------------"
 	echo "Note: with Ubuntu Releases"
-	echo "During Install, after proxy setup, there seems to be a LONG delay..."
-	echo "(worst case 5 minutes on my Beagle xM)..."
-	echo "Currently Investigating..."
+	echo "During Install, after proxy setup, there seems to be a VERY LONG delay..."
+	echo "(on average it seems to be taking anywhere between 10-20 Minutes)..."
+	echo "In the background: Ubuntu is trying really-really hard to find a compatible kernel..."
 	echo "-----------------------------"
 	echo "Reporting Bugs:"
 	echo "https://github.com/RobertCNelson/netinstall/issues"